This little barrel-shaped cottage by Lake Superior was once a cartoonist's summer retreat.

This unusual three-way wooden foot bridge spans two rivers at once.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

A Memphis park where you can walk the whole Mississippi River in one go.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

Ride the subways of yesteryear.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

A modern zoetrope on the New York City subway.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

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.

Sniff the Titan Arum's rotting flesh.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

This unusual apartment building may be Brooklyn's own version of the Leaning Tower of Pisa.

Become a prohibition rebel.

This secluded ruin was once a home for exotic plants.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

This metal eagle one of the final remnants of a newspaper that wanted to keep Brooklyn to Brooklyn.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.