Hello everyone and welcome back to Scary Interesting.

In this video, we're going to go over three stories featuring caves that are incredibly unique compared to the others covered on the channel.

And because of these unique features, they probably never should have been entered at all, as the people in the story found out.

As always, viewer discretion is advised.

About 12 million years ago, an underwater volcano formed in the Atlantic Ocean that produced many eruptions over the course of 9 million years. And with the help of tectonic plate movement, the island of

Tenerife, as we know it today, was created. Tenerife is the largest of the canary

islands and sits about 300 miles or 480 kilometers off the western coast of

Africa. The canaries are a chain of islands that are Spanish territory and

Tenerife is the most populated among them, with nearly 1 million people

calling it home today. In terms of annual visitation, however, Tenerife is the most populated among them, with nearly 1 million people calling it home today.

In terms of annual visitation, however, Tenerife sees five times that as one of Spain's most popular and important vacation destinations.

Most tourists come for the beautiful beaches, but the landscape of the island is incredibly diverse for a landmass of just 785 square miles. Central

Tenerife is home to dense pine forests while closer to the coastline you'll find steep

rocky terrain, beaches and of course caves. Unlike some of the places featured on

the channel to this point, tourists don't feel an irresistible draw to the island's caves.

Instead, the complex underground

systems on the island are more of a hidden gem reserved for those with an adventurer's side.

Scientists take great interest in the caves of Tenerifei too. That's because many of the island's

caves aren't caves in the traditional sense. Instead, they're actually lava tubes.

When a volcano erupts, lava travels outward through self-made

channels, and when particularly thick and slow-moving lava seeps out of the earth, it remains

extremely hot in the channels while the area around the lava actually cools. This causes a hard

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