This old Victorian bathhouse is fed by an ancient spring.

Amidst towering office buildings, a local pub lives inside Sheffield’s oldest surviving domestic building.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

The video game-themed street art first popped up in the French city.

A strange and ancient landscape hides the dark, cavernous remains of a 5,000-year-old flint mine.

A deadly ancient portal to the underworld.

Roman ruins top white travertine terraces formed by ancient hot springs.

A charming beach town in Turkey captures all the colors of the rainbow.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

The ancient latrines of the Greeks, in all their public glory.

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

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

The eclectic home of a leading Turkish architect is a gorgeous piece of eye candy.

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

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

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

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

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

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

The ornate miniature mansions were built for Istanbul's feathered residents.

A marvel of Byzantine engineering under the streets of Istanbul.