This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

The whole world in one water tank.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A monument marks the location of the first successful steamboat demonstration.

Bizarre Cavern.

A Civil War Museum with some notable medical antiques.

Built by the patriotic residents of Boonsboro in a single day.

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

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

This university transit system is a 1970's vision of the future.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

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

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

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

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The oddly shaped, steam-spewing building is now an art studio and gallery.

A table rock formation that has been intriguing West Virginians for years.

An alternate history park where the Union Army loses the war... to dinosaurs.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

An overgrown collection of miniature buildings still stand as evidence of one couple's obsession with The King.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.