The blinking light atop the iconic landmark has been sending secret messages for decades.

King Ludwig I's collection of beautiful women.

The footprint of a frustrated devil in Munich's Cathedral.

A stairway to heaven, or to nowhere at all.

A tiny, hidden alleyway dedicated to the father of meteorology.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

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

These mysterious mazes carved on the rock may be up to 4,000 years old.

A writer's tiny retreat built from salvaged shipwreck timbers.

Giant wind turbine with observation deck at the very top.

Tiny castle in the middle of the Rhine made you pay to pass.

This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.