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

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

An ancient octagonal weather station named for the eight Greek gods of wind.

Where commuters walk through remnants of an ancient Greek necropolis.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Tiny memorials honor individual victims of the Holocaust.

This stunning concert hall has become a symbol of Iceland's national recovery.

The oldest church in Iceland is one of the few to feature ornate decoration.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

This elegant arc of a waterfall marks a religious turning point.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Charnel house at the foot of Mount Sinai.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

One kilometer of thick brass rod laid out before your eyes.

The former sign of this immortal music venue is just that--undying.