Christ's blood allegedly preserved in a Belgian town.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A unique underground structure dating back to the 1st century BC.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

A quaint medieval harbour where Benjamin Franklin landed in 1776.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

The world's largest boar is a huge steel titan found at a French rest stop.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

A narrow strip of land is home to the tallest migrating dunes in Europe.

A memorial to a goat culled during a foot and mouth disease outbreak guards a series of fantastical caves.

It is said a heartbroken man visited the gap every day to stare blankly out at the sea.

These engineering masterpieces are a dominant feature of the Belfast skyline.

One of the largest lenses of its kind ever created, this former ship beacon has been brought down to Earth.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th century.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

The first island in the world designated a light-pollution-free astronomical observation point.

A statue erected in honor of the toadish nickname given to Jersey residents by the French.

An intricately decorated tiny place of worship.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

This enchanting mountain plateau celebrates spooky local folklore.

While most bridges allow roads to pass over water, this one allows water to pass over a road.