This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This aging storage facility is the world's largest brick warehouse.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

This historic electric train has operated with regularity since the early 1900s.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Colorful and chaotic stacked hotel in North Holland.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

A moving memorial to the fallen and missing from WWI trenches.

A rare example of World War I trenches from the British front.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Walk in the footsteps of the gods and straddle two tectonic plates.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The most powerful waterfall in all of Europe.

This stunning concert hall has become a symbol of Iceland's national recovery.

Twisted buildings adorn the banks of the Rhine river.

Fantastic views and thousands of love locks.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.