The oldest farmer's market in America is so ancient it was approved by the King of England.

This abandoned sea fort has become an accidental bird sanctuary.

A haunting tribute to pioneering photographer Clover Adams.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

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.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A monument celebrating the idea of reaching inaccessible places.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Step inside Lucy, the world's largest "elephant."

"A hideous albatross in the Hudson River Valley."

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

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

Famous for its bio-luminescent inhabitants, known as "dismalites."

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.