Light still pours into the ruins of this ancient Islamic observatory.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Dynastic Home of the De Piro Family.

The rocks are a time capsule of a 407-million-year-old Earth.

Looking for a unifying history, Uzbekistan finds its answer in a 14th Century Turco-Mongol conqueror... despite the fact he wasn't Uzbek.

The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The Avenue of Mausolea is a series of grand palatial tombs.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

1513 Turkish world map, full of European state secrets and snarky commentary.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

This historic hotel invented the chocolate brownie.

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

Mysterious stone tower featured in many alternative histories of the New World.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Cold war icon and onetime "hole" in the iron curtain.

A restaurant and observation deck built in a unique broadcasting antenna.

The prototype for all Nazi concentration camps.