A delightful but little-known public observatory and planetarium in Munich.

An abandoned train station in Munich constructed for the 1972 Olympic games.

A subterranean display of public art and architecture.

One man's personal kunstkammer, museum and shop.

One of the most easily accessible examples of the rare 1960s UFO houses.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A stairway to heaven, or to nowhere at all.

A portrayal of two lamps embraced and in love.

A landmark in the history of technology and computing is hidden in a tiny Baroque chapel.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

The astonishing collection of an infamous criminologist.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

A fake medieval village in the middle of Turin.

Villas that once served as playgrounds for the rich now fall away in decay.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

A small island dotted with old, historic Finnish buildings.

An alien church provides much needed silence in the midst of a Finland shopping center.

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.

A subterranean house of worship carved right out of the bedrock.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

Once a meeting point for great thinkers, and the midpoint of the country.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The world's first combination ski slope and power plant.