Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

This rustic old building is said to be the most photographed barn in America.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

A hidden three-foot-wide house separates these two regal churches.

A small but charming botanical garden that contains many exotic plant species.

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

An early 20th-century bullring converted into a modern shopping center.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Mountain where Jesus was first tempted by the Devil.

This cemetery features modernist statues as strange as its name.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

It was once nicknamed "the most bombed hotel in Europe."

This massive monument has been telling the time for 150 years—at a slight angle.

These barriers stand as stark reminders of Northern Ireland's troubled past.

The last Victorian market in Belfast.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

A museum marks and documents the site of the Titanic's launch.