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

A lawn full of retired spacecraft on display at one of NASA's first research labs.

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

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

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

This statue honors the author's groundbreaking family story.

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

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

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

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

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

A hidden alley in urban Baltimore is a haven for graffiti artists.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.