This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

Take a step into the workshop where Edison and his employees revolutionized the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The site of Paul Revere's historic two lantern warning.

Home of the only civilian casualty at the Battle of Gettysburg.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.