Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

A rehabilitation center for confiscated, orphaned, and abandoned chimpanzees.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

The summer home of the largest colony of bats in the world.

An amazing stag sculpture constructed entirely of discarded materials.

These boots are made for selfies.

Three hundred years of preserved Spanish colonial history in San Antonio.

Ruins of a once-opulent grand Victorian resort.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

This giant sculpture is both loved and disliked by the local community.

A vibrant portrait celebrates the actress in her hometown.

A colorful public mural in San Antonio's West Side encourages students to stay in school.

The 40-foot-tall votive candle is the largest of its kind.

An English explorer's vast natural history collection has the first realistic dioramas of animals staged in their natural habitats.

A 131-year-old wunderkammer of Texas history.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

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

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

The 19th-century ruins hide deep in an overgrown forest.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

A geological wonder that helped fuel myths of trolls and giants.