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.
I was heading back to my hotel after taking some photos during the blue hour in Toronto, Canada when I found this passageway completely by accident. The little white stripe at the end of the tunnel is some traffic going by.