The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Population: 1.

This Wyoming town is fascinated by a particular mythical creature.

A scenic natural bridge with a creek running underneath.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

A popular rock that acted as a waymarker for American pioneers.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

This sandstone building is a relic of the Overland Trail.

This remote river crossing was a popular campground on American westward expansion trails, and a former Pony Express station.

One of America's largest retail chains got its start in one of its most remote rural destinations.

Evanston's historic railroad complex saved this rail town from reaching the "end of the line."

One of the world’s largest suspended aquariums, located in Dubai Mall.

These headstones and a few stone foundations are all that remain of a once-booming mining town.

This lonely gas station has stood at this location since 1917.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

One of the earliest subway stations in Stockholm, which still looks like the 1950s.

An oasis of shade and color amidst the bustle of the old city.

Home to over 1,000 street signs, this museum offers visitors an opportunity to travel over 70 years back in time.

This restored eighth-century palace is a shining example of ancient Umayyad architecture.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.