Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This stone complex marks the urban center of a lost civilization.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The oldest inn in England served brew to the crusaders.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

The world’s largest concentrated solar plant generates as many problems as megawatts.

A spiritual vortex among the red rocks in Sedona.

A Saint Nicholas-themed ghost town in the Mojave desert.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Legends surround this jagged rock formation in the New Mexico desert.

An eatery for UFO seekers on the Extraterrestrial Highway.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

Mysterious meeting place for UFO hunters near Area 51.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.