If you go to Odaiba in Tokyo, you will find an eighteen metre tall Gundam waiting for you. Go to Shiokaze Kouen, then head south (harbour on your right). Keep going and you'll find a large group of people taking photographs of it. The ones that really amused me were the guys that stood in front of it pointing up at it while their girlfriends took their picture.
At certain intervals, its engines light up and steam ejects. More photos below the cut.