The only surviving piece of Copenhagen's 16th-century defensive wall.

Hans Christian Andersen for the postmodern world.

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

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

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Baroque celebration of the end of the Great Plague of Vienna.

This tremendous timepiece was once the largest cuckoo clock in the world.

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

Crop circles inspired this whimsical garden in Germany.

A German apartment building hosting as many trees as human occupants.

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