Kalarskiy Geyser

Kalarskiy Geyser is a small geyser, or, rather intermittent thermal spring in remote, beautiful area of Siberia. Fountain is some 0.2 – 0.5 m high.

Benitoite Gem Mine (California State Gem Mine)

The only find of benitoite of gem quality.

Weeki Wachee Springs

Large spring, coming from a cave. The explored depth of cave is 124 m and thus it is the deepest freshwater filled cave in the United States. Explored length of passages – 7,260 m. Unique underwater theater – mermaid show – operates here since 1947.

Popa Falls (Popa Rapids)

Impressive rapids or waterfall across Okavango River. Falls are some 900 m wide and 2.5 – 4.5 m high.

Aouk-Kladuk Underground River

World’s most powerful underground river. Aouk-Kladuk Underground River is some 1.5 kilometres long. The stream has a volume of 130 – 180 cubic meters.

Keek sinkhole

One of the tiankengs of Aouk Underground River. Keek sinkhole is bell-shaped hollow that is some 160-180 m deep, its volume is 1.4 million cubic meters.

Hafasu Tiankeng

One of the tiankengs of Aouk Underground River. Hafasu Tiankeng is some 100 m deep, with a volume of 12 – 15 million cubic meters.

Kuom Tiankeng

One of the tiankengs of Aouk Underground River. Kuom Tiankeng is some 100 – 160 m deep, with a volume of 15 – 20 million cubic meters.

Aouk Underground River

Amazing system of more than 6 km long underground passages with one of the most powerful underground rivers in the world. System has three tiankengs.

Top 10 waterfalls of the world

Wondermondo 🢖 Lists and articles 🢖 Top 10 waterfalls of the world Publication Top 10 waterfalls of the world   In short Here are listed 10 most impressive waterfalls of the world. Map of the sites What is needed for a truly great waterfall? Lists like this are subjective – the magnificence and attractiveness of waterfalls cannot be measured and […]