Island where motor vehicles are banned -- home to the only carless highway in the United States.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

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

Remnants of a storybook amusement park hidden behind a strip mall.

A winding district gerrymandered into the shape of a mantis.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

This former asylum for Black Americans is haunted by its history of violence and racism.

Once America's tallest structure, now a Baltimore landmark.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

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.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

A museum dedicated to exhibiting remarkable outsider art.