Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Two flush headstones mark the only known graves to be embedded in an airport runway.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

The only presidential monument to display a late POTUS's actual casket.

The angel of death appears to weep black tears at this grave marker.

This quirky curiosity shop takes its cues from the world's bazaars.

"X" marks the spot of an echo chamber in the middle of a plaza.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

Go inside to really appreciate this 500-year-old technological masterpiece.

One of the largest underground systems runs under Canada's largest urban center.

A geological mystery on Camelback Mountain.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

Former villa and estate of James Deering developed to preserve native tropical forests.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.