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

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

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

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 section of the long chain that blocked enemy ships from entering Constantinople.

Quite possibly the oldest love poem known to humankind.

A fountain standing as a testament to a doomed alliance.

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.

Turkish adventurer antiques in the heart of the Grand Bazaar.

Come for the whole sides of slow-roasted lamb, stay for the regional Kurdish specialties.

An artificial hill and apparent calendric structure built in the Early Middle Ages immortalizes a legendary Polish princess.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

Learn the fine art of making a centuries-old treat at this hands-on food museum.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

Inside this Krakow church, an explosion of psychedelic color.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This man-made mound monument was built out of soil from all across the Polish empire.

A memorial to the beloved brown bear that served in the Polish army during World War II.