This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

The only castle in North America to ever house European sovereigns.

Frida Kahlo's childhood home, now a museum of her life and works.

A labyrinth of clothing, electronics, and other counterfeit items.

Go inside to really appreciate this 500-year-old technological masterpiece.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

The seat of Buffalo government is a gorgeous Art Deco palace.

One of the largest underground systems runs under Canada's largest urban center.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

An antique cemetery in New York, this land is home to any number of famed corpses.

The gravestone of the suffragist leader attracted extra visitors during the 2016 election.

The largest known open fault in the United States is basically a giant natural refrigerator.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The lost town of Neversink, sunk by New York City.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

A wall within the institution displays the names of 13,000 Jews who took refuge in the city during World War II.

The once highest point in China blends symbolic design with a kick of adrenaline.