A beautiful maze marks where three countries meet.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

This abandoned hospital has a long history, having housed both German and Soviet soldiers in the course of its life.

These engineering masterpieces are a dominant feature of the Belfast skyline.

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.