Mysterious 500-year-old tapestries depict a unicorn hunt.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A priceless collection of the Nation's cryptologic history.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

An iconic Soviet statue of working-class people.

Moscow's imposing monument to the Space Age.

Gargantuan home of Russian science.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

World's largest bell sits on the grounds of the Kremlin in Moscow.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Some of the saint's blood and bones are said to reside in Dublin.

This small town was built around a marble quarry and named after one of the most famous sources of marble in the world.

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The house where the writer spent his formative years.

The modern birthplace of Irish freedom.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.