A fountain standing as a testament to a doomed alliance.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

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

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

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

Atop this arch, during the 16th-century, a sermon was given to those suffering from plague.

Legend has it that Bishop Oliver King dreamed of angels ascending to heaven and ordered the church's reconstruction in the late 1400s

The largest stretch of the Berlin Wall is right on top of the former SS headquarters

The Golden Dome is the most recognized building on the beautiful campus of the University of Notre Dame

The mural faces the football stadium and has been known as Touchdown Jesus since 1964

A statue honoring the great University of Notre Dame football coach

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

A sweet symbol marks the place where torturous executions were once carried out.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A magician and his beloved, pampered canine were buried together, within days of each other, due to a tragic twist of fate.

Family-run for more than a century, this pizzeria makes a unique mustard pie.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

The last surviving submarine from a strange chapter of Finnish history.

This Hindu temple in suburban New Jersey is the largest in the United States and one of the largest in the world.