Monasteries on rock pillars, once accessible only by frayed ropes.

Odd outsider art installations surround a Gold Rush-era ghost town.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A self-built castle made by a mysterious man.

Explore 10 acres of environmental sculptures.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The largest earthwork effigy in the world.

A modernist landscape of water and sci-fi concrete.

Take a drunken tour inside the world's largest known geode.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Where beautiful signs live on forever.

Experience park where visitors are told to expect the unexpected.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A speakeasy takes on Chicago's drinking culture.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

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