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

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

This Danish art forest places loud works of contemporary art among the pensive silence of nature.

Preserved "bog person" that is over 2,000 years old.

Denmark's famous pseudo-hill.

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

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Stocking up on the world's best beer requires a pilgrimage to a monastery drive-through.

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

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

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

A collection of weird and wonderful art fills a former houseplant nursery.

What was once a bustling mining installation is now a bustling hub of contemporary art.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

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

Fortified medieval tower house with lovely roof garden.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.