The ruins of a 12th-century Cistercian monastery can be found alongside World War II tank traps and pillboxes.

The door of St. Lawrence’s Church features small scars from a battle that took place nearly 400 years ago.

This concrete monster of a wreck lies in the mouth of Langstone Harbour as a monument to the incredible history of D-Day.

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

Four alabaster giants contemplate the tides on the shore of Denmark.

Remnants of the Nazis' occupation of Denmark linger along the sand.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

This inverted metropolis model is the artist's "revenge" for not being allowed to have a doll house as a kid.

This unique architectural wonder is home to luxury apartments.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

Nordic giants resurrected from the sea and restored to their former greatness.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

This medieval "painted village" is famous for its geometric facades.

An alien landscape on the banks of the Aegean Sea.

Legend says this sacred tree was a gift from goddess Athena.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A spectacular cave and a beguiling lake.

The hallucinogenic center of the ancient world.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.