How exactly are the caves formed ...

Caves most often form in areas of limestone, but on the coast they also occur in other rocks. Limestone is composed of calcite, which dissolves in the carbonic acid which can be found in rainwater and natural humic acids from decaying vegetation. Acidic water flowing through cracks and joints between the limestone and rock layers, breaking the surface in blocks of rock separated by deep cracks and potholes called also marked by sinkholes where surface currents can disappear. Underground, the acidic water dissolves the rock around cracks, opening a network of passages and caves, which can become large if the roof of the cave colapses. Several other features are formed when dissolved calcite is redeposited.

Cave Unicycling - Would You Dare to Try?

If caving itself is not challenging enough for you anymore, then we have awesome news for you!

In this video, we see a story about amazing people who found a way to connect the two activities they like the most. You may find each of the two equally difficult, but not these guys. 

Unicycling is "very rhythmic and meditative" for them, but cave unicycling requires additional focus and preparation. It's amazing how easy it all seems in this video, but it would be mission impossible for most of us. At least for me it would.

I leave you with a six-minute video with some amazing cave unicycling action!

Emerald Ice Cave Showing Colors Like It's From Another World

Few days ago I stumbled upon these beautiful images from inside a cave in Russia.

A very brave photographer, Sergey Krasnoshchekov, went inside this cave to capture the amazing colors.

The cave is sculpted during a hot spring that occured this year, and Sergey had to wait until the perfect conditions were made during the summer. It is possible that these structures collapse, so he had to be extra careful.

The melting increased as the years gone by, so the layers of ice created an amazing sculpture with beautiful colors. I would say these colours and the sight itself were set out in a different world, wouldn't you?

The colors appear that way because the sun rays try to reach through, but instead they only illuminate the inside of the cave and create this effect.

Althought this sight might not appear as adventurous as some deep and dark caves, I certainly enjoy watching it.

If you have some similar visual experience, be sure to comment below.