This 11th-century castle sits so low you can't see it behind the surrounding buildings.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Colorful and chaotic stacked hotel in North Holland.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

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

This memorial museum chronicles the apocalyptic destruction of the First World War.

These ramparts, once lined with towers, were constructed in defense of Beaune.

Lake within a lake.

French commune at the heart of conspiracies.

A fortified palace in the shape of a ship on the Thiou river.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

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

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

A beautiful and classically designed villa, with an hourly infestation of monsters.

A Gothic cathedral created from volcanic rocks.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

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

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

This banal Parisian entranceway is not what it seems.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.