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

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

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

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

Wedged between two sets of row houses is an awkwardly located family graveyard.

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

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

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

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

This one-room cabin where the young colonel slept during the French and Indian War.

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.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

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

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

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

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.