A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

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

A sixth-century Byzantine cistern hidden below a modern carpet store.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A fountain standing as a testament to a doomed alliance.

This museum was invented in a novel before being made real by the author.

Step back in time and witness the fall of Constantinople.

A Turkish monastery tucked into a cliff wall.

Roman ruins, natural methane fires and a lovely beach.

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

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

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

A meow-velous tribute to a beloved street cat, made famous on the internet.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.