The last surviving submarine from a strange chapter of Finnish history.

This semi-permanent cathedral was built of cardboard, wood, and steel after Christchurch's 2011 earthquake.

An immersive Māori village where you can learn history and heritage through dance, ceremony, song, architecture, and food.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A reconstructed World War I-era communications array that was once hidden in plain sight.

This 15th century church is where the Pilgrims spent their last night in the Netherlands before setting sail for America.

A memorial to the Netherlands' most famous privateer.

An underground museum of monks, bones, and medieval ruins.

This bellfry was once said to be the Devil’s lair—or perhaps the home of a mischievous gnome?

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

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

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

Copenhagen's "other" little mermaid marks the historic location of past sea maid sightings.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The largest stretch of the Berlin Wall is right on top of the former SS headquarters

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A fascinating insight into daily life in the Eastern Bloc.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

A remnant of the Franco-Prussian War, lodged in the city's walls.

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

There has been an astronomical clock on this spot since the 14th century.