The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

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.

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

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

A fountain standing as a testament to a doomed alliance.

Turkish adventurer antiques in the heart of the Grand Bazaar.

Have tea in a cemetery with a dazzling view of Istanbul.

This family-owned canteen has been selling goat milk ice cream since 1933.

Eat your way through history.

One of the newest mosques in a city filled with thousands.

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

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.

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

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

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

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

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

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.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.