Ecosystems

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

See replicas of Europe's most famous cave paintings and even some of the animals that feature in the art.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

Monkeys inhabit the lush forest surrounding ancient Mayan ruins once considered sacred.

A mile-long navigable cave adorned with stalactites and stalagmites reaching up to 65 feet tall.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

The largest known open fault in the United States is basically a giant natural refrigerator.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."