A former major munitions plant that has been converted into a sprawling art space.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The land is home to swimming ponies and a legendary 18th-century treasure.

This giant disembodied horse head seems to balance impossibly on its nose.

A local prank turned town icon.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A unique sculpture park that specializes in the huge and bizarre.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

Found: Garden of Eden in Miami-Dade County, Florida.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

Memorial to the father of the Republic of China.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

These rat eating Giant Malaysian Pitcher Plants may have evolved to eat shrew poop.