Places Jochen Duckeck Wants to Go

Inside a former smuggler's cave, an artificial waterfall and light show.

The bones of prehistoric animals and early signs of human habitation have been found inside Malta's "cave of darkness."

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

In 1888, a resident of Xagħra, Malta, discovered a small underground chamber filled with stalactites and stalagmites when digging a well.

A small cave network was discovered under a home in Xagħra, in 1924 when the owner was digging a well.

The spectacular geological formations make it one of the most impressive caves in Europe.

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.

Home of a 28-foot tall stalagmite known as the War Club.

This statue in Talcott, West Virginia, is an enduring symbol of American grit.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

A temple dedicated to the 13th-century Alevi Turkish dervish credited with bringing Islam to the Balkans.

Cave shrine on Monte Pellegrino.

A historic cavernous cistern lies hidden behind a wall at San Marino’s stamp and coin museum.

This centuries-old mine remained hidden beneath a hotel bar until 2013.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

Built on a medieval synagogue, this church has a burial crypt, tunnel system, and Jewish ritual bath hiding deep underneath.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

According to legend, after Hades pulled Persephone into the underworld, one of her attendant nymphs cried so much that her tears formed this spring.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

A spectacular slot canyon at the northern edge of Lake Mead National Recreation Area.

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

A curious cave church carved into the face of a cliff.