bard: Comments

'Symbolic Gate' by Lee Kelly
http://virtualglobetrotting.com/map/symbolic-gate-by-lee-kelly/

This is Eglin AFB site C-87, used as an IED detection and disarming training area. Each cul-de-sac has one or more mock buildings (library, bank, school, farmhouse, airport terminal, etc.). Further info: http://www.military.com/NewsContent/0,13319,83167,00.html

Photo of the airline terminal mockup:
...

Cecchina water tower (Centro idrico Cecchina) by architect Francesco Palpacelli.

It's some sort of water supply facility, possibly a pumping station.

http://www.thelivingmoon.com/49ufo_files/03files2/UFOs_in_Google_Earth.html

http://www.aquatim.ro/ro/153/surse-de-apa.htm

Part of an infrasound monitoring station.
http://wikimapia.org/#lat=-7.939598&lon=-14.376597&z=19&l=0&m=b&v=8

Part of an infrasound monitoring station.
http://www.flickr.com/photos/ctbto/3817611492/in/set-72157621903224687
http://wikimapia.org/#lat=-7.9377389&lon=-14.375149&z=17&l=0&m=b&v=8

Concrete artwork created by Fritz Balthaus for the 2001 Bundesgartenschau (National Garden Show). The 'K' can stand for Kunst (art) or Konkret (concrete). More info: http://www.balthaus.org/en/K.html

That should be "Technical," not "Technological"

It's the "aula" (a sort of meeting hall) of the Technological University of Zvolen. The pinwheel-like shape of the roof is used as the university's logo.

Map: http://www.skse.sk/sse-files/html/aktivity/RR2007/pozvanka.html
Photo: http://cit.tuzvo.sk:8080/Zvolen/mapa/aulatu.htm

Stadion Im. Czesława Kobusa, home of Chemik Bydgoszcz football(soccer) team.

http://pl.wikipedia.org/wiki/Stadion_im._Czes%C5%82awa_Kobusa

It's the logo for GC-Gruppe
http://www.gc-gruppe.de/

It's the Prestons Road ventilation shaft for the Jubilee Line of the London Underground.

'Cathall Green' is the name of this place. It has one circular area with climbing boulders and another with various exercise equipment.

http://www.walthamforest.gov.uk/index/leisure/parksrec/parks-op-spaces/open-spaces.htm

No, it's by Christoph Freimann.

http://commons.wikimedia.org/wiki/File:Tuebingen_11_128.jpg

Mission head office for the Tenseishinbikai religion.

http://www.tenseishinbikai.com/Hakkoshinden.jpg