The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

Final resting place of the immigrant who brought artificial seltzer water to America.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

A hands-on traveling collection of the innovative devices of yesteryear.

A way to take your secrets to someone else's grave.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

Unusual books about food and drink abound in this 19th-century New York townhouse.

The unassuming structure was part of a Major League Baseball stadium.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

The only surviving fragment of the lost Narragansett Pier Casino.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

This ancient Egyptian obelisk still bears the wounds of World War I.

A mysterious shape catches the eye in this 16th-century painting.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

The secluded beach getaway from Wes Anderson's dreamy summer romance.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.