The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

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

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

This ancient market is often referred to as the oldest shopping mall in the world.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Stunning examples of Russia's 18th-century wooden architecture.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Legend says the goddess this shrine honors curses any couples that pass by.

It's bad manners to eat and drink on the subways of Tokyo, unless the train is this bar. 

If Hello Kitty were Mickey Mouse, this would be Disneyland.

Infamous and now demolished panopticon prison built by its former inhabitants.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Strange masks and obscure costumes are housed in this old Madrid corrala.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

This cemetery features modernist statues as strange as its name.