Known as the "Stairway to Heaven," this historic canal dates back to the 1700s.

A great example of the inventive canal bridges that were deliberately split down the middle.

This medieval manor house was equipped with secret compartments for hiding priests.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

The obelisk honors the cyclist troops who were killed during World War I.

The world's most active stratovolcano is almost always erupting.

An art-filled botanical garden and former dyeworks hiding in plain sight.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Copenhagen's celebrated theme park and gardens.

Peace Park and the Atomic Bomb Dome.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

A collection of historic buildings in central Birmingham blend seamlessly into the cityscape but have an interesting story to tell.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

For over 500 years this timbered alms house has provided a home for elderly residents of Coventry.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

A church of bones, decorated with 40,000 human skeletons.