A peace symbol in Northern Ireland is among the world's largest hedge mazes.

Northern Ireland's Brobdingnagian stepping stones.

The heart of Dutch football history.

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

1898 German railroad depot museum with working engines, steam train excursions, and hands-on displays.

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

An icon of International Style architecture on the outskirts of Rotterdam.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

A bridge that has seen many reiterations over its lifetime.

Four giant movable street lights decorate this modern Rotterdam square.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A strange rock formation with numerous legends trying to explain it.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

Terrifying derelict military hospital once housed a recuperating Hitler.

Cold war icon and onetime "hole" in the iron curtain.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Two gravestones clasp hands over the religious divide.

This massive collection of taxidermy is full of specimens collected by missionaries during their international travels.

A former customs station on the border of Germany and the Netherlands.

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

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

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

The struggle of a small Dutch island against the sea.