Grotto replete with mystical designs laid out in glued shell mosaics.

Overlooking the seaside town of Margate stands a tribute to an artist's lover.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

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

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

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

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

One of the oldest bridges in Norwich was used during the English witch trials and is said to be haunted.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

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

This section of the Kennet and Avon Canal has been designated the same level of heritage protection as Stonehenge.

The plaques around this 19th-century structure recall some rather strange tales.

Legend says the people of Wiltshire got their "Moonraker" nickname from this small pond.

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

Ancient human remains unearthed around the iconic monument.

The oldest working mechanical clock in the world.

Famously misunderstood wonder of the ancient world

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A monument to the man who almost killed Hitler.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.