This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This one-time health resort was used by aristocrats around the world.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The geoglyph once sported a glass bottle eye.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

Illegal drag racing two stories beneath Chicago’s streets.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

An obelisk commemorating Lincoln's role in connecting the coasts.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Unusual finds in this shrine to local law enforcement include a 19th-century vampire-slaying kit.

The rogue roots are gradually consuming some of the historic marble grave markers.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.