Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

The largest stone moai on Rapa Nui.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

The spectacular and eerie moss-covered grave site of 19th-century Belgian merchant.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A hidden gallery exhibits intricate, decades-old Buddhist reliefs.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

More than 350 million years ago, western New York was covered in a vast sea. Today, you can dig up the remains of the plants and animals that lived there.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A mysterious castle built as a monument to lost love.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Two massive rock outcroppings on the Oregon coastline.

A massive sea stack famous for its appearance in The Goonies.