Twice a year, this floating library delivers thousands of books to the remote islands of Stockholm’s archipelago.

Every Tuesday, students let off steam by screaming into the night air.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

This unassuming passageway played a key role in one of the most important events in U.S. history.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

A much-maligned monument to teetotalism.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

Home to a vast and influential collection of Shakespeareana.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

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

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.