Old Windmill with volcanoes in background near Tefia, Fuerteventura, Canary Islands, Spain

Kunsthaus, the Museum of Contemporary Art, aka the Friendly Alien, blob architecture by Peter Cook and Colin Fournier, Graz, Styria, Austria

Wernerwerk multistory building in the evening, entrance, sign, Siemens AG, Berlin, Germany.

Wernerwerk multistrory building in the evening, entrance, sign, Siemens AG, Berlin, Germany.

Woman standing in a red revolving doorway looking at the camera; Lugano, Ticino, Switzerland

Peace Hotel Interior of foyer with marble floor upper balcony and revolving door at entrance, Shanghai, China