Rent out a glass igloo to watch the Northern Lights like you live in the future.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

Amsterdam's Red Light District leaves little to the imagination.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

Pilgrimage site for star-crossed lovers.

This Italian foot path winds through the mountains via 52 individual tunnels.

The remains of 50,000 World War I soldiers rest under a towering arch overlooking the Alpine battlefields.