The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

A micronation on an islet along the coast of a Portuguese island.

A lush oasis full of vibrant plants and striking geometric displays.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Broken Catholic cross now worshiped in the voodoo faith.

A macabre sculpture museum in the capital of Haiti fuses human bones with broken metal to create challenging contemporary art.

Thousands of Haitians travel to the waterfalls to ask the Virgin Mary of Mount Carmel and her voodoo counterpart Erzulie for healing in a yearly pilgrimage.

The royal seat of Henri Christophe, a formerly enslaved man who became Haiti's only king.

This iconic fortress was once the crown jewel of Haiti's national defense.

Iran's colorful terraces are a rare geological masterpiece.

Send a postcard while vacationing with Satan.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

A natural gas leak provides a flickering flame beneath a waterfall.

A collection of unique outdoor sculptures surounded by the beauty of nature.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Petrified footprints of one of the very first vertebrates to walk on land.

This single room has survived the centuries with almost no deterioration.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.