Current hiking trail which includes the path Benedict Arnold followed before his treason was discovered.

A centuries-old stone pagoda from Japan stands among cherry trees beside the National Mall Tidal Basin.

Home of Philip Johnson, one of the 20th century's most influential architects.

American artist J. Alden Weir purchased this 60-acre estate for $10 and a painting.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

Lie in a hammock where George Washington stood.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The home of the first American-born saint is one of the only curved buildings in New York.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This miniature village stays behind in the Breuer Building, even as the museums around it come and go.

A pocket of jungle amidst urban expansion in Panama.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

A museum celebrating mola textiles, the intricate art of the Guna people of Panama.

This softball diamond has a culture all its own.

New York City's only preserved family home from the 19th century.

Wooden pavers represent a 17th-century barrier that gave Wall Street its name.

This sculptural piece by the artist Tom Otterness doubles as a jungle gym.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The real-life site of Ichabod Crane's infamous gourd attack.

This bizarrely tree-like red skyscraper is one of the newer additions to Barcelona’s skyline.

This oceanfront 1920s house museum offers visitors historic art and rare plants across five distinct ecosystems.