One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

A military museum and library dedicated to the citizen soldier.

A chance to follow in the footsteps of the word's most legendary animator.

No one knows how many bodies are in this vault in a Chicago public park.

A Bibliophile's Dream.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

What once sat in the world’s spotlight is today a largely disused ghost complex.

Where commuters walk through remnants of an ancient Greek necropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

Monasteries on rock pillars, once accessible only by frayed ropes.

An endless sea of white conical domes.

This striking art museum holds an amazing series of curiosity cabinets.

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

A bizarre house filled with an astounding array of collections.

A lush green oasis in the middle of Chicago.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A walk through the historic city center, under the streets of Seattle.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The ruined doorway is a portal to the building's turbulent and torturous past.