I found this ceiling during a trip to Toronto, Canada. The first time I was there I didn't have my tripod, so my photos were taken at 1600 ISO, which is a bit "grainy". But, to get higher quality images I went back on the last day of the trip (with my suitcase in tow) with my tripod and got some nice shots at 100 ISO...until they kicked me out. Apparently you can shoot all you want if it's handheld, but if you use a tripod you need a permit. To be honest, I suspected I might get kicked out, I just tried to shoot as much as possible before that happened.
Himeji Castle in Japan at sunset. It's one of only 12 surviving original castles in Japan and is a world wonder in my opinion. If you are in Japan DO NOT miss seeing this castle.
I think this is actually called the Atrium mall, but I'm not completely sure. I found this while wandering around downtown Toronto. An extreme wide angle lens helped to accentuate those diagonal lines.