Watch maple syrup being made without ever leaving the city.

The metal truss bridge served as the sole entry point to an "isolation island" for smallpox outbreaks throughout the 1870s and early 1940s.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Canada's subterranean Cold War museum has doubled as a movie set.

A tribute to the man who invented basketball stands in his Canadian hometown.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

Located on the banks of the St. Lawrence River, this mansion is home to a massive art collection.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

A wonderous place devoted to art and metal.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

A painfully obvious spy house sits right across the street from the Russian Embassy.

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

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

The world's oldest soul food restaurant is also one of its best.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

Visit a fourth-generation farm and museum dedicated to everyone's favorite fungi.

The first marker along the famous boundary.