Tuesday, November 12, 2019

Perth Canyon

Inundated river canyon, which was similar in size to Grand Canyon in Arizona, United States. Up to 1.5 km deep. Contains the largest plunge...

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....

Ball‘s Pyramid

Unusual remnant of volcano – 562 meters high and just 200 meters wide cliff rising directly from the sea. Tallest volcanic stack in the...

Fraser Island

The largest sand island in the world, 1,840 km². Contains dunes up to 24 metres high, tall rainforest growing at elevations up to 200...

Sistema Sac Actún

World's largest known underwater cave system. Since the discovery of a connecting passage to Dos Ojos system this is the second-longest cave in the...

Víðgelmir

World's largest (by volume) lava tube cave. 1,585 meters long cave, with a volume of 148 000 m³. Contains ice formations, evidence of habitation,...

Mount Erebus – the southernmost active volcano

A large and active volcano in Antarctica should be something unusual. Thus, Mount Erebus is very unusual indeed - it is one of the...

Dragon Hole

Currently the deepest known underwater sinkhole (blue hole) is Dragon Hole - 300.89 m deep hole in a shallow shoal in Paracel Islands. This sinkhole...

Naica Cave of the Crystals

It is possible that entrails of the Earth hide more caves like this - but up to this day Naica Cave of the Crystals...

Hranice Abyss (Hranicka Propast)

The impressive sinkhole near Hranice town - Hranice Abyss - has been known for centuries. But over the last decade it turns out that...