Dragon Hole

Dragon Hole with expedition vessels

Wonder Dragon Hole   In short Currently the deepest known underwater sinkhole (blue hole) is Dragon Hole – 300.89 m deep hole in a shallow shoal in Paracel Islands. Rating 46.0% GPS coordinates 16.5250 N 111.7681 E Location, address Asia, China (disputed), Paracel Islands, in shallow bank to the east from Pattle Island, near Discovery Reef […]

Sima Humboldt and Sima Martel

Sima Humboldt and Sima Martel, sinkholes in Venezuela

Wonder Sima Humboldt and Sima Martel   In short On the top of the grim, forest covered mountain, in a cave, there is living Evil Spirit, hunting for humans. Sometimes he is heard devouring human flesh and then a terrible sound “Sari… sari…” is heard… Rating 55.5% GPS coordinates 4.685500 N 64.218500 W Location, address South […]

Teiq sinkhole and cave

Wonder Teiq sinkhole and cave   In short One of the largest sinkholes of the world is Teiq sinkhole in Oman. Rating 42.8% GPS coordinates 17.1552 N 54.6272 E Location, address Asia, Oman, Dhofar Governorate, 57 km NEE from Salalah, north from Tawi Atair Category Sinkholes, Caves Alternate names Tiq Cave, Tahik sinkhole, Teeq Cave Depth […]

Xiaozhai tiankeng

World's deepest sinkhole - Xiaozhai tiankeng, with tourist route visible

Wonder Xiaozhai tiankeng   In short The largest sinkhole of the world is Xiaozhai tiankeng – incredible, up to 662 m deep pit with nearly vertical walls. This is one of the most impressive natural attractions on Earth. Rating 53.3% GPS coordinates 30.7505 N 109.4701 E Location, address Asia, China, Chongqing Municipality, 30 km south from […]

Minyé sinkhole and cave

Crossection of Minyé sinkhole, compared with Boeing 747-400, Papua New Guinea

Wonder Minyé sinkhole and cave   In short The incredible hole in the equatorial jungle – Minyé sinkhole and cave system – is true wonder of the world but only few people have seen it from above – from airplane of helicopter. Even fewer people – truly the chosen ones – manage to descend into it […]

Great Blue Hole

Great Blue Hole, Belize

Wonder Great Blue Hole   In short Photographs taken from the air show incredible, nearly perfectly round, deep blue circle in shallow atoll some 70 km east from Belize City. This unique formation is the Great Blue Hole – enormous sinkhole existing here at least for 150,000 years. Rating 58.2% GPS coordinates 17.3155 N 7.5345 W […]

Crveno Jezero – Red Lake

Crveno Jezero sinkhole, lake

Wonder Crveno Jezero – Red Lake   In short The largest and, as it seems, the most impressive karst formation in Dinaric Alps is Crveno Jezero – one of the largest sinkholes of the world. Rating 51.3% GPS coordinates 43.4544 N 17.1991 E Location, address Europe, Croatia, Split-Dalmatia, some 23 km north-east from Makarska, 1.5 km […]

Sotano de las Golondrinas – Cave of the Swallows

Caver rappelling down into the Sótano de las Golondrinas, Mexico

Wonder Sotano de las Golondrinas – Cave of the Swallows   In short One of the most impressive sinkholes in the world is Sotano de las Golondrinas – Cave of the Swallows. This hole in the ground is that large that it is nearly impossible to comprehend it – even if one is sitting at the […]

Black Hole of Andros

Cross section of South Andros Black Hole in south - north direction, compared with Boeing 747-400

Wonder Black Hole of Andros   In short Just some 100 kilometers away from the crowded city of Nassau with its highrise hotels there is nearly unexplored land with some of the most mysterious karst formations in the world – black holes. The best known and the most impressive among them is the Black Hole of […]

El Zacaton sinkhole

El Zacaton and Nacimiento spring

Wonder El Zacaton sinkhole   In short One of the most impressive natural landmarks in Mexico is El Zacaton sinkhole. It is the deepest known water filled sinkhole in the world. Besides this the sinkhole contains endemic classes of microorganisms and unusual floating islands. Rating 54.5% GPS coordinates 22.9930 N 98.1658 W Location, address North America, […]