This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

This Aztec structure remained hidden until the demolition of a supermarket exposed the lost temple.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

Psychedelic murals coat the inside of a nondescript research library.

Diego Rivera hid various people and symbols in his first large-scale mural project.

This museum houses two of Mexico's most impressive Aztec monoliths.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

No other place in Scotland has such a high concentration of prehistoric carved stone surfaces.

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

The largest greenhouse in the world is home to over one million types of plants.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

One man's lifelong obsession with death.