A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

This abandoned sea fort has become an accidental bird sanctuary.

Hidden in the plaza next to a pizza shop is an amazing little oddities shop.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

This statue honors the author's groundbreaking family story.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

A relic of FDR's brief foray into utopian urban planning.

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

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

A Civil War Museum with some notable medical antiques.

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

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.

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

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

Ship skeletons haunt Baltimore's waterways.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

This Asian-inspired tower in a lush urban park provides spectacular panoramic views of Baltimore.

A priceless collection of the Nation's cryptologic history.

These vibrant row houses are a unique example of Baltimore kitsch.