One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

The spot where the two men ate together now stands enclosed in glass.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

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

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.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

A rural colonial settlement that contains the remains of a store and cooper.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

Nine nice parcels of land along a flight path offer a quiet respite... until a plane soars overhead.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

A massive marble foot is tucked away in a small alley near the Pantheon.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.