1. Photo by Evan Leeson - http://www.flickr.com/photos/ecstaticist/3154991047/

2. Photo by Jeff Kubina - http://www.flickr.com/photos/kubina/153872024/

3. Photo by Jeff Kubina - http://www.flickr.com/photos/kubina/153871892/

4. Photo by mrgeebee - http://www.flickr.com/photos/mrgeebee/7395541964/

5. Photo by Jöshua Barnett - http://www.flickr.com/photos/angel_malachite/4294319578/

8. Photo by San Mateo County Library - http://www.flickr.com/photos/smcl/1074676952/

9. Photo by ° Giuliana * - http://www.flickr.com/photos/giuliana86/8500143876/

10. Photo by Olga Ferrer Saladié - http://www.flickr.com/photos/olggaaa97/8652864842/

21. Photo by Ben Kreunen - http://www.flickr.com/photos/ben-kreunen/3261629025/

23. Photo by Kevin Dooley - http://www.flickr.com/photos/pagedooley/1882317616/

24. Photo by Chase Elliott Clark - http://www.flickr.com/photos/chasblackman/6795013658/

27. Photo by seyed mostafa zamani - http://www.flickr.com/photos/seyyed_mostafa_zamani/4266283238/