TUNNEL ABSEILING PLUS tour the underground

Look down, then trust the rope. This underground abseiling tour combines a 550-meter World War II fortress with guided rope descents, audio-video effects, and a small wine tasting. I like the unusual mix of unfinished military construction and natural rock, and I like that the first descents help you build confidence before the harder section. The main drawback is the location information: the experience is described as being in Rovinj, but the meeting point is listed in Rijeka, so you should confirm the exact start point before paying for transport or accommodation.

The maximum group size of eight should keep the outing personal, and guide Ela has been praised for her warm manner and clear stories about Rijeka and the cave. Still, this is not a simple sightseeing walk. The underground temperature is 14°C, non-slip shoes are mandatory, and the final cascading-rock descent can be slippery and more demanding.

Key points to know before booking

• A 550-meter World War II fortress: You explore an unfinished underground site shaped by both military construction and natural rock.
• Three main abseiling challenges: Abseil Plus includes the first two descents, followed by a more difficult descent on cascading rock.
• A gradual start: An instructor backs up the early abseils, helping you get used to the rope and technique.
• Optional paired descent: You may try a simultaneous abseil with another participant.
• 14°C underground: Bring warmer clothes, even if the day outside is hot.
• A small-group format: The tour accepts no more than eight people and runs for about two and a half hours.

Inside the 550-meter San Giovanni fortress

The strongest part of this outing is the setting. You are not abseiling at a standard outdoor climbing wall or simply walking through a polished museum. The route passes through an unfinished World War II fortress that was forgotten and concealed for years before being prepared for visitors.

That unfinished quality matters. The fortress combines human engineering with rock formations, so the route should feel less uniform than a purpose-built attraction. You can expect a mixture of constructed underground spaces and natural surfaces, with the surroundings forming part of the challenge.

The name San Giovanni appears in the tour information, while one description refers to the cave as being in Rijeka. Since the advertised location also says Rovinj, I would treat the meeting address as the most important detail to verify. The listed start point is Adventurer adventure tours, Plase ul. 21, 51000 Rijeka, Croatia. Do not assume that a booking labeled Rovinj begins in Rovinj.

The site was only opened to visitors after being put in order and equipped for the public. That gives the tour a sense of discovery without suggesting that the place is untouched. You are visiting a prepared attraction, but its forgotten past and incomplete construction remain part of the appeal.

How the Abseil Plus route builds confidence

The tour is designed in stages rather than sending you straight onto the most difficult descent. That is a sensible plan for anyone who has little or no previous abseiling practice but still wants a physical challenge.

The first two descents let you learn the basic movement with an instructor’s backup. You can get used to the harness, rope, and sensation of lowering yourself down a rock face. The early sections are important because abseiling can feel strange even when the technical steps are simple. Your body has to accept that the rope is holding you while your feet work against the rock.

The Plus version then adds a descent on cascading rock inside the fortress. This surface is described as uneven and slippery, so it requires more care than the earlier sections. You should expect to move slowly, follow the guide’s directions closely, and place your feet with purpose rather than treating the descent like a quick thrill ride.

That progression is one of the tour’s best features. You are given a chance to gain a sense of security before attempting the more demanding part. It also means the experience may suit you if you want something more active than a cave tour, but do not already feel like an expert climber.

There is also an option to abseil simultaneously in pairs. That adds a social element and can make the descent more memorable, though it may not be the right choice if you prefer to concentrate alone. The tour does not promise that every participant must use this option, so you can ask the guide about it on the day.

What the guided underground visit adds

The abseiling is the headline feature, but the guided tour gives the activity its context. Without the fortress, the rope work would be a short adventure exercise. Inside San Giovanni, it becomes a way to see a strange wartime structure that blends architecture and natural rock.

The guides also provide information about the history of Rijeka and the cave. Ela is specifically praised for her cheerful approach and for explaining the history during the tour. That personal touch matters in an underground space, where the atmosphere can otherwise feel like a series of dark passages and equipment checks.

Audio-video special effects and projection are included. These effects add a staged element to the visit, so you should not expect a completely raw, unaltered cave experience. Some people will enjoy the extra atmosphere and visual presentation. If you prefer abandoned sites with no added production, this may feel less authentic.

The balance is reasonable: you get a real underground fortress, physical descents, a guide, and presentation effects. The attraction is trying to tell a story, not simply provide a rope and a helmet.

Gear, clothing, and the 14°C temperature

All abseiling equipment is supplied. It is certified under current standards and checked regularly, which is an important practical point when the activity involves rope work and uneven rock. Professional certified guides are also included, along with insurance.

You must bring shoes with non-slip soles. This is not a suggestion. The requirement is especially important for the final cascading-rock section, where the surface may be wet or slippery. Ordinary smooth-soled casual shoes could make the activity less comfortable and may lead the agency to refuse participation.

Bring a warmer layer. The underground temperature is 14°C, which can feel chilly when you are standing still during instructions or waiting for another person to descend. A light jacket or warm top should be more useful than heavy clothing that restricts movement.

You should also think about clothes that allow your legs and arms to move freely. The available information does not set out a detailed clothing list, so avoid making assumptions about what the agency supplies beyond the abseiling equipment. Your own footwear remains your responsibility.

The tour is not recommended for people with epilepsy or claustrophobia. You also take part and enter the underground facility at your own risk. Alcohol and drugs are not compatible with the activity, and the agency may change or refuse participation if someone arrives under the influence.

Is $90.36 fair for two and a half hours?

At $90.36 per person, this is not a cheap cave walk. It is also more than a simple sightseeing admission because the price includes equipment, certified guides, insurance, entry to the underground fortress, audio-video effects, and wine tasting.

I think the value depends on what you want from the outing. If you only want to look around underground, you may find the price high. If you want a small-group activity with several guided descents and safety equipment included, the cost is easier to justify.

The maximum of eight people is another value point. A small group should allow the guide to spend more time explaining technique and watching each descent. Abseiling has built-in pauses, so a larger group could make the two-and-a-half-hour schedule feel slow. The small capacity helps keep the focus on instruction and safety.

The wine tasting is a pleasant extra, though it should not be the main reason to book. This is an active tour first. You are paying for access to an unusual fortress and for a supervised abseiling experience, with the tasting as a closing touch rather than the central event.

The duration is about two hours and thirty minutes. That is long enough to include orientation, the guided underground visit, several descents, and the added presentation without taking up an entire day.

Weather, meeting point, and schedule

The activity is offered in English and operates daily from 9:30 a.m. to 5:30 p.m. during the stated operating period, from August 22, 2024, through December 8, 2026. Your booking confirmation is expected within 48 hours, subject to availability.

The tour requires suitable weather. The agency can change or adjust the route when conditions are poor, and a weather cancellation should result in an alternative date or a full refund. Since the final rock section is slippery by nature, weather decisions are a practical safety issue rather than a minor scheduling nuisance.

The listed start and end point is Adventurer adventure tours, Plase ul. 21, 51000 Rijeka. The activity ends back at the meeting point. Public transportation is nearby, but the supplied information does not give a travel time or route, so check your own connection carefully.

Again, confirm the location before booking. The tour summary names Rovinj, while the meeting address is in Rijeka and the guide description refers to Rijeka’s history. That mismatch is the clearest practical warning in the booking information.

Private tours and other dates or times are available on request. This could be useful for families, clubs, or small groups that want a more flexible schedule, but you would need to arrange those details directly.

Who should choose Abseil Plus?

I would choose this version if you want a real physical activity but prefer a gradual introduction. The instructor support on the first descents gives you a chance to learn before facing the uneven cascading rock.

It should suit adults and other participants who can manage a supervised rope descent and are comfortable in an underground setting. Most people can participate, but that does not mean the tour is effortless. You need steady footing, enough mobility to work your feet against rock, and the confidence to follow instructions in a confined place.

You may prefer the regular Abseil tour if the Plus version sounds too demanding. The alternative is specifically described as a no-experience-required option, so it is the better choice if you want less difficulty or are uncertain about the final descent.

This is not the best match if you dislike enclosed spaces, have epilepsy, lack non-slip footwear, or want a relaxed cultural visit with no physical element. It is also a poor choice if you expect a warm indoor attraction. At 14°C, the fortress will feel cool.

Final verdict: should you book it?

Book this tour if you want an unusual combination of history, natural rock, and supervised adventure. The unfinished 550-meter fortress gives the outing a setting you are unlikely to find on a standard city tour, while the staged descents let you build confidence before attempting the harder section.

I especially like the small group, the instructor backup, and the fact that equipment, insurance, entry, and guiding are included. Guide Ela’s friendly approach is another encouraging detail if you value a tour that feels personal rather than mechanical.

Before booking, confirm that Rijeka is truly your start location, pack a warm layer, and bring proper non-slip shoes. If the location works for your plans and you are comfortable with heights, enclosed spaces, and uneven rock, Abseil Plus offers solid value at $90.36. If you mainly want to see the fortress without a serious physical challenge, choose the easier Abseil option instead.

Cancellation is free up to 24 hours before the start time. Cancellations or changes made later are not refunded, except when the agency cancels because of weather or an insufficient number of participants.

FAQ

Where does the Tunnel Abseiling Plus tour start?

The listed meeting point is Adventurer adventure tours, Plase ul. 21, 51000 Rijeka, Croatia. The activity ends back at the meeting point.

How long does the tour last?

The experience lasts approximately two hours and thirty minutes.

What does Abseil Plus include?

Abseil Plus includes the first two descents, a more demanding descent on cascading rock inside the fortress, and the option to try a simultaneous paired abseil.

Is abseiling equipment provided?

Yes. Certified abseiling equipment is provided and regularly checked. Professional certified guides and insurance are also included.

What should I wear?

Bring warmer clothes because the underground temperature is 14°C. Shoes with non-slip soles are mandatory.

Can I cancel for a full refund?

Yes, if you cancel at least 24 hours before the experience start time. Late cancellations and changes are not refunded. If the agency cancels because of poor weather or an insufficient number of participants, you will be offered another date or a full refund.