Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

Mural fragments and various sculptures honor the longtime artist.

Once the smallest park in the national system.

Historical figures from New York City's Catholic community reside in Midtown.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Statue commemorating the use of ether in anesthesia.

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

This historic Boston building has gone from personal estate to porn theater and back again.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Two mermen, eternally spitting into each other's mouths.

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

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

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

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Two thousand artifacts from around the world collected by one woman who loved to travel.

This popular pitstop lives up to its name.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.