One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The bones of an old zoo crumbling in the shadow of a new one.

A kaleidoscope gallery and steampunk emporium named for a pioneering journalist.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

San Diego's most historic and haunted home.

Michigan's oldest operating hotel predates the state itself.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This beloved American snack was conceived by a hungry coal miner.

This historic train station has been converted to a locomotive themed hotel.

The pan man stands as a testament to the functionality of American cast iron cookware.

The secret city built by the Manhattan Project.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.

Advice-columnist's bell tower, paid for with pennies.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The unbelievably opulent home built for an infamous newspaperman.

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

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.