Europe's largest dinosaur museum was founded by a passionate autodidact.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Artifacts showcasing the witchy history of Zambia.

America's first federal monument.

An original apothecary from 1792.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

A modern day curiosity cabinet.

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

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

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An enormous, inside-out glass globe built in 1935.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

No one messes with the Massachusetts sacred cod, not this time...

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Bouncing, delightful, mechanical art at the MIT Museum.

A submerged archeological park still holds the wonders of a Roman Sodom.

A mushroom-shaped outcropping that has come to be the symbol for an entire town.

2300-year-old Roman road connecting the empire.