The wild west is still alive and well at this authentic mining town watering hole.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

This singular art museum in São Paulo is unique inside and out.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

This nine-story building can be played like an instrument.

This doorless 20th-century elevator doesn't stop or slow down.

A Jenga-style cylindrical tower of books that appears to go on forever.

Macabre astrological automaton clock dating to the late 1400s.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

The Guardian of Tallinn.

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

The oldest inn in England served brew to the crusaders.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

What was to be the world's most secure Cold War document vault ended up as just a few shallow caves.