Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Descend into the tunnels to experience the life of a coal miner.

The history of sea-faring refuse and disaster is on cramped display in this Netherlands folk museum.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

A grassy pyramid named after a French battle.

At the base of this tower, a plaque marks the original center point of the Netherlands.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

These temples are among the oldest free-standing stone buildings in the world.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This unique building in the main square stands out among the city's typically Baroque architecture.

The cutest way to stay safe in traffic.

Atop this former dutch railway office sits an interstellar work of art.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

The heart of Dutch football history.

The first crematorium in the Netherlands.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This magnificent church allows travelers along one of Germany's busiest roadways a chance to rest and reflect.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

Take a walk in a recreation of ancient Rome.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.