Exact replica of the ancient monument, but much, much lighter.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The site of the climactic scene from the classic horror film is now a historic landmark.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

One of the only memorials dedicated to journalists who died in combat.

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

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

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

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

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

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

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

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

This abandoned sea fort has become an accidental bird sanctuary.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

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

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

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