The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Copenhagen's celebrated theme park and gardens.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Hans Christian Andersen for the postmodern world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

Perhaps the most scandalous statue of America's first president.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

This massive swimming pool is the high tech home to the human-powered submarine races.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.