The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

The world's longest known cave system.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Northern Ireland's Brobdingnagian stepping stones.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Towering basalt columns, a creation of fire and ice.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A bizarre house filled with an astounding array of collections.

A church of bones, decorated with 40,000 human skeletons.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A giant granite cross remembers missionary Father Frederic Baraga, and his safe passage across an angry Lake Superior.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

When waves crash onto this section of beach, the rocks sing a song.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.