It's believed this golden brick is part of the legendary lost Aztec treasure.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

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.

A small building that loosely resembles a tooth is appropriately used as a dentist office.

This tiny garden was built specifically to provide a place of peace and serenity away from the busy city streets.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

A fruit-loving town welcomes visitors with a giant melon set against the sky.

An entire subdivision was accidentally built on a flood plain, resulting in its eventual demolition—but the streets are still there.

Austin’s beloved dive bar and karaoke headquarters where relaxed drinks and high-energy singalongs have defined nights on South Congress for decades

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

Climb inside an iron crystal magnified 165 billion times its normal size.

One of the best-preserved pieces of DDR propaganda in Berlin.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The world’s first penitentiary, meant to be humane, drove men insane.

Stockholm's deepest subway station is also a stunning ecological wonder.

A museum that dives into Sweden’s maritime past through preserved shipwrecks and interactive exhibits.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

It houses the remains of a 17th-century version of the Titanic.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.