After witnessing the rise and fall of three empires, this ancient city was finally destroyed by a series of earthquakes.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

A curious cave church carved into the face of a cliff.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A 11-foot former president stands on a Kosovo street that also bears his name.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

A touching tribute to the "Queen of Soul."

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This abandoned subway station can still be seen on regular commuter trips.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

The former hotel where Tesla invented the radio.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Discovered in a peat bog, these horned helms come from a thousand years before the Viking Age.

Mysterious installations bring levity and light to a sometimes stodgy city.