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

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

One of the largest trees of its kind in California.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The only public swimming pool in Baltimore open to Black Americans during segregation is now a permanent memorial art exhibit.

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

This massive sycamore tree has been labeled as one of the largest in the state.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

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

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

The world's largest piece of copyrighted artwork.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This popular Boston haunt is reminiscent of a time gone by, when slow cafes and sweet-smelling smoke wafting from patios was the norm.

A former waterfront market is now in the center of town due to some interesting Boston engineering.