An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

A family agreed to sell their property to Disney on the condition that this tree, planted as a wedding gift, would not be removed.

The site of the largest mass execution in Rhode Island history, haunted by the ghosts of hanged pirates.

This stone in Lexington honors a formerly enslaved man who fought during the American Revolution.

A historic bridge no one is allowed to cross.

Mural fragments and various sculptures honor the longtime artist.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

The span is crooked and made from two older recycled bridges.

A fitting attraction for the corn capital of the world.

A glimpse into early 19th-century education.

An ode to Japanese artist Hokusai, with a bit of a comical twist.

At this local mall, visitors are ushered through a 1940s jail exhibit.

The birthplace of the Herndon Gas Company.

Mysterious installations bring levity and light to a sometimes stodgy city.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

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

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

The last remaining building in Washington, D.C., built by H.H. Richardson, one of America's most iconic architects.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

Inside this library, the history of Los Angeles is retold through a mural.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

The historic home of an educator, abolitionist, activist, and poet.

This bank is widely believed to be the inspiration for the offices of Philip Marlowe, the hardboiled detective featured in a number of Raymond Chandler's stories.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.