Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Fantastic views and thousands of love locks.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

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

A subterranean display of public art and architecture.

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

The patron saint of spinsters grasps a container of dried blood.

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

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

The first passenger cable car in the world.

Inspired by the more famous Scrovegni Chapel, Cappella di San Giovanni contains several amazing frescoes.

Abandoned cemetery of the former Psychiatric Hospital of Volterra.

A sculpture serving as an homage to Pope John Paul II.

This ancient market is often referred to as the oldest shopping mall in the world.

This large, circular tomb is the final resting place of the first emperor of Rome.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A concrete mushroom that divided Stockholm residents for nearly a century.

This hole formed by a glacier is the largest and best-preserved of its kind in Stockholm.

From a distance, this structure looks like an ordinary office building but a closer inspection reveals a unique facade.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

Sound travels strangely in this underground whispering gallery.