Yellala Falls

Yellala Falls on Congo

The last major rapids on the Congo River. Over the series of several falls, the river falls some 10-14 m over a distance of some 2.5 km. Congo is approximately 1 km wide there.

Veryovkina Cave

Veryovkina Cave, ascent from the Babatunda pit

The deepest known cave in the world, 2 212 m deep. Discovered in 1968, but the full depth was reached in March 2018.

Warm Mineral Springs

Warm Mineral Springs

Enormous spring of warm mineral water with healing properties. This is one of the candidates for the legendary “Fountain of Youth” in Florida. The diameter of this spring is approximately 75 m, depth – 70 m. Discharging 390 l/s and considered to be the largest warm mineral spring in the whole world. In the spring have been found well preserved skeletal remains of humans, mastodon, sabertooth tiger.

Kazumura Cave

Kazumura Cave, collapsed floor of the lava bed

The longest lava tube in the world, 65.5 km long and up to 1,102 m deep.

Mauna Loa

Mauna Loa from the path to the summit of Mauna Kea

Volcano with the largest area in the world among the volcanoes that are above sea level. It rises 4 169 m above sea level and 9 170 m above its base.

Mount Shishaldin

Mount Shishaldin at sunset, Aleut Islands

The most symmetrical cone-shaped and glacier-clad mountain in the world. This 2857 m high volcano is continuously active and emits a plume of steam.

Devil Mountain Lakes

Devil Mountain Lakes

Possibly the largest maar in the world – two joined round lakes formed by a volcanic eruption some 21 000 years ago. The diameter of lakes reaches 8 km. Several more maar lakes are nearby.

Perth Canyon

Inundated river canyon that was similar in size to Grand Canyon in Arizona, United States. Up to 1.5 km deep. It contains the largest plunge pool in the world that once was created by a gargantuan waterfall. It is 2 km long, 6 km wide and 300 m deep.

Jenolan Caves

Stalagmite in Jenolan Caves

Possibly the oldest caves in the world – it is determined that the clay sediments of the caves are approximately 340 million years old. 10 caves opened for tourism. Length of passages exceed 40 km and there are more than 300 entrances.

Ball‘s Pyramid

Ball's Pyramid

An unusual remnant of a volcano – 562 meters high and just 200 meters wide cliff rising directly from the sea. Tallest volcanic stack in the world. Up to the recent time, this was the only place in the world where the up to 15 cm long Lord Howe Island stick insect (Dryococelus australis) was living.