Tokyo by day is not a spectacular as the nighttime view but you can still see the very modern architecture.
There is a section of the observatory that has a glass floor. If you have fear of heights I suppose this can be scary. I thought it was pretty cool!
Another cool place to see is the Imperial Palace in the Chiyoda District which is home to the emperor of Japan and his family.
A large moat surrounds the castle to provide security. The water doesn’t look too deep so I don’t think it would be too hard to cross. Maybe in the Edo period, it was deeper!