The ghostly remains of what was once the world's richest copper mine.

A miniature city, once ruled by the Queen of the Netherlands.

The largest 19th century panorama in the world still in-situ.

Brussels' favorite peeing boy has a sister.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

This ghost town in Belgium will lose its street art when it ceases to exist.

The Bristol Camera Obscura housed in an ancient windmill.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The world's northernmost aquarium looks like it has fallen over.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

Structure built from the skulls of vanquished foes.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.