Ecija [3] by ubiquity_zh on Flickr.
cubes by (David C. Kramer) on Flickr.
arqsa:

Living architecture by AlexFlanders …..OFF on Flickr.
Lineae, Curvae by Dermot Russell on Flickr.
arqsa:

DSC_0300 -1-NIK-RUSSET-20 by decphoto2012 on Flickr.
fiore-rosso:

erich stahl.
arqsa:

Building Blocks by shutterclick3x on Flickr.
nurnielfa:

Some sun rays
thomasperreon:

© Thomas Perréon, 2014.
eduardoseco:

Intermediae  ©Eduardo Seco