These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Contractors in this Oregon town have been stamping their names in sidewalks since 1908.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This single room has survived the centuries with almost no deterioration.

A hugely vast Irish landscape of barren rock that stretches for miles.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

A stunning Victorian abbey and walled garden on a lakefront.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

This Neolithic passage tomb forms part of a World Heritage Site.

The ancient tomb acts as a calendar that keeps perfect time.

This center tells the story of one of the most famous battles in Irish history.

An ancient neolithic tomb that only sees the sun twice a year.

One of Ireland's most infamous prisons for rebels including men, women and children.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Experience what life was like in Ireland during the Viking and medieval ages.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.