An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.

Trace the history of writing at this unusual North Carolina destination.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

This cuddly rodent has a place of honor at a Russian institute for genetic research.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

Eulogizing an unknown man's unusual demise.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

An Industrial Revolution-era public work that purified water using nothing but sand.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

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

An overlooked tribute to one of the most important peace deals in American history.

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

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

People escaping slavery may have hidden inside a corpse vault.

A public art jibe at one of the United States’ oldest and longest-serving senators.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

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

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A wondrous old library overlooking the nation's capital.