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Explore Hranice Abyss in 3D – the world’s deepest flooded freshwater abyss



There are some places that few have seen or are yet to be discovered in the Czech Republic. They are hidden underground, created by water over millions of years… gorges, stalactite domes, canyons. Now, thanks to virtual reality and divers’ video recordings, the public has the opportunity to dive into the deep and explore the Hranice Abyss in 3D.

The popularity of the Hranice Abyss’ encouraged the town of Hranice to open a new information center in the former Teplice nad Bečvou station, a 1939 Functionalist building, cultural monument and important example of railway architecture from the first half of the 20th century.

The information center features an interactive 3D model of the Hranice Abyss, capturing the latest knowledge and research on the abyss.

“The abyss is an incredible natural rarity. We wanted to show visitors, using a large 3D model, what is beneath the surface and on the rising slope,” described architect Jitka Mácová.

3D glasses are available to help show various parts of the abyss, especially the places visitors cannot access. The 3D model was created based on videos recorded by the divers between 2000 and 2017, and then assembled with software. There is also a cinema where visitors can view a short film about the abyss.

The cave diving organization ZO 7-02 Hranice Karst, in cooperation with SG Geotechnika a.s., documented the Hranice Abyss through digital aerial photogrammetry using an unmanned aircraft (UAV). They acquired data which aided in the creation of the 3D digital georeferenced model of the abyss’ dry part. As a result, the model has accurate dimensions, inclinations, and articulations of the rock massif.

Check out the below Hranice Abyss video by Petr Chmel, Pragoaquanaut:

The Hranice Abyss is truly perilous due to its unique water composition. The ČSS ZO-7-02 Hranice Karst divers recently had to use closed-circuit diving equipment, CCR Liberty by Divesoft, to avoid chemical reactions and impaired visibility. With this equipment, the divers could safely dive 50 meters below.

Just how deep is the Hranice Abyss? The abyss was created atypically by mineral water springs far beneath the surface and therefore, it is not certain where the bottom is, though some theories suggest it could be as far down as 1200 meters. In 2015, divers reached 265 meters.

On the other hand, a recent analysis of the water indicated that there are helium isotopes that rise up from 40 km below. “How the helium gets into the abyss and how deep the water are big unknowns,” the President of the cave diving organization, ZO 7-02 Hranice Karst, Michal Guba, explained.

Some of nature’s secrets are yet to be discovered…

The vistor centre opening hours are Tuesday to Friday from 10 am to 4 pm, and on weekends from 9 am to 5 pm.

Address: U Teplic 552, 753 01 Hranice | phone: +420 778 888 643 | e-mail: | website:


DIVE SHOW SPECIAL: Save up to 40% off your next liveaboard with Oyster Diving Holidays



red sea liveaboard

Scuba Scene, the leading name in luxury liveaboard dive experiences, is excited to announce an incredible limited-time offer on its Red Sea itineraries. Dive enthusiasts can now embark on the ultimate underwater adventure aboard the Scuba Scene Liveaboard at discounts of up to 40%, making it an unbeatable opportunity to explore the wonders of the Red Sea.

red sea liveaboard

Itineraries for Every Diver:

Shark Weeks:

Immerse yourself in the thrilling world of sharks with specially curated itineraries focused on these majestic creatures. From the awe-inspiring hammerheads to the elusive oceanic whitetips, Shark Weeks with Scuba Scene promise an unforgettable experience for shark enthusiasts.

‘Brothers, Daedalus, and Elphinstone’:

Explore the iconic dive sites of the Red Sea, including the Brothers Islands, Daedalus Reef, and Elphinstone Reef. These itineraries offer a diverse range of marine life, vibrant coral reefs, and the chance to encounter pelagic wonders.

red sea liveaboard

Deep South:

For the more experienced divers seeking a deeper adventure, the Deep South itineraries take you to the lesser-explored regions of the Red Sea. Discover hidden gems, untouched coral formations, and marine life that thrives in the deeper depths.

Scuba Scene is offering up to 40% off on selected Red Sea Liveaboard itineraries, making this the perfect time to turn your diving dreams into reality.

Whether you’re a novice or an experienced diver, Scuba Scene ensures an inclusive and personalized experience for all levels of expertise.

red sea liveaboard

Why Choose Scuba Scene:

  • Luxury Accommodations: Experience unparalleled comfort in well-appointed cabins and communal areas.
  • Experienced Dive Crew: Dive with confidence alongside a team of expert dive masters and instructors.
  • Customizable Itineraries: Tailor your dive experience to match your preferences, ensuring a personalized adventure.

Now is the time to secure your spot on the Scuba Scene Liveaboard and explore the Red Sea like never before. These exclusive discounts are available for a limited time, promising an extraordinary underwater experience at an irresistible price.

Horizon 3 Liveaboard, the epitome of luxury and adventure in the Maldives, invites scuba enthusiasts and travellers alike to experience the enchanting underwater world with unprecedented savings. Embark on an unforgettable journey through the crystal-clear waters of the Maldives aboard Horizon 3, and make the most of exclusive discounts on select itineraries.

red sea liveaboard

Special Offer Itineraries

17th to 31st March 2024 – 14 Night Itinerary:

Original Price: £4,670

Now Only £3,500 (Save 25%)

31st March to 7th April 2024 – 7 Night Itinerary:

Original Price: £2,330

Now Only £1,750 (Save 25%)

14th to 21st April 2024 – 7 Night Itinerary:

Original Price: £2,330

Now Only £1,750 (Save 25%)

These exclusive discounts present an extraordinary opportunity for adventure-seekers to indulge in the luxury and thrill of a Horizon 3 Liveaboard experience at unbeatable prices. Horizon 3 is renowned for its world-class service, top-notch amenities, and expertly curated itineraries that showcase the mesmerizing beauty of the Maldives’ underwater paradise.

To book your adventure and take advantage of the up to 40% off offer, visit Oyster Diving Holidays  or contact their dedicated customer service team at 0800 699 0243.

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Gear News

Get a FREE undersuit when you buy a trilaminate drysuit from Scubapro





SCUBAPRO is launching its 2024 drysuit promotion:

With the purchase of a trilaminate drysuit EVERTECH DRY BREATHABLE or DEFINITION DRY, SCUBAPRO gives you the matching K2 EXTREME undersuit (GBP 345) for free.

If that’s not a reason to start drysuit diving, because in our climate it’s drysuit season all year round! So don’t miss out – the promotion is valid until May 31, 2024 at participating SCUBAPRO retailers and in participating regions.

All information at

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Experience the Red Sea in May with Bella Eriny Liveaboard! As the weather warms up, there’s no better time to dive into the crystal clear waters of the Red Sea. Join us on Bella Eriny, your premier choice for Red Sea liveaboards, this May for an unforgettable underwater adventure. Explore vibrant marine life and stunning coral reefs Enjoy comfortable accommodation in our spacious cabins Savor delicious meals prepared by our onboard chef Benefit from the expertise of our professional dive guides Visit our website for more information and to secure your spot: or call 01483 411590 More Less

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