Ho Chi Minh's perfectly preserved body has been on display here since 1975.

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

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

This small condiment museum makes all manner of mustards with a 200-year-old mill.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Four cars from the old system were once on display, but were removed in 2014.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

For almost a century, this East Village newsstand has served egg creams to beats, hippies, punks, and everything in between.

A graffiti Mecca welcoming artists from around the world.

An accidentally hidden library containing the ephemeral history of New York.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

This outdoor gallery of sculptures along the East River was once a landfill.

Celebrating the greatest pugilists the world has ever known.

The rare American Civil War-era weapon was never fired in anger.

The return of something once considered a basic part of life.

The highest rapid transit station in the world.

Staten Island's original central park is the former home of the city water supply as well as thousands of immigrant graves.

The childhood home of one of America's greatest unsung troubadours still stands in a much changed Brooklyn neighborhood.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

Nearly four centuries after its founding, remnants of one of the oldest planned communities in North America are still visible in southern Brooklyn.