The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Millions of numbers carved in glass represent the tattoos forced upon victims.

A mysterious stone embedded at the base of a historic Boston building.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

New England's tallest light house stands on an island with a history of cannibalism and death.

The only remaining historic maritime signal station in the United States.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Explore the dark underground corridors of this graffiti-covered former military fortification.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Believe it or not, the now-ubiquitous California avocado originated in Guatemala.

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

Step back in time and witness the fall of Constantinople.

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

This eatery re-creates dishes from the Ottoman Empire so you can dine like a sultan.

The most metal church of all time was built in record time because of an international, pious pissing contest.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

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.

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

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

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

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