For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

Go take a picture with the inventor of the daguerreotype photographic process.

This North Carolina store preserves a historic moment in America's movement for racial equality.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Ancient barriers wrap around what was once an important stop along the Silk Road.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

A cemetery with goat-horn bedecked gravestones.

A memorial to the thousands of Turkmen soldiers and civilians who died in a bloody 1881 battle.

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

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

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Where pardoned turkeys once spent their all-too-brief final days.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The oldest still-operating tavern in the United States was once owned by a pirate.

Morocco’s modern capital was once a haven for Barbary pirates, who went so far as to establish a republic of their own.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

One of downtown Berlin's last reminders of its Communist past.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

Exact replica of the ancient monument, but much, much lighter.