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

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

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

A surprising and unconventional mosque hidden in the subsoil of Istanbul.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

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

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

A marvel of Byzantine engineering under the streets of Istanbul.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

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

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Turkish adventurer antiques in the heart of the Grand Bazaar.

A tiny park in the middle of some big power politics.

Ancient serpentine sacrifice holder that has stood the test of time.

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

A fountain standing as a testament to a doomed alliance.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

One of only three examples of a stained glass window manufactured by the Tiffany Company in Scotland.

Once designed as a natural history museum, this building is now home to a massive art gallery.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.