This parking garage was the site of what was - at the time - the largest cash robbery in history.

America’s oldest community theater, this Boston club has been in operation since 1877.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

No one messes with the Massachusetts sacred cod, not this time...

Painstakingly built dioramas sit unnoticed in a Boston office building.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

Ice cream stand, snack bar, and time capsule of milk conveyance.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

An ancient knight and a symbol of the city's freedom.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

It houses the remains of a 17th-century version of the Titanic.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.