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

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

The world's oldest continuously operating airport was founded by the Wright Brothers.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

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

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

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

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

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

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

The land is home to swimming ponies and a legendary 18th-century treasure.

An eerie, decaying ghost town destined to fade into the forest.

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

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

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.

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

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.