Models, Gundam Front Tokyo
Gundam has been around since the late 70s in Japan in the form of various anime TV series, manga, comics, toys, etc. and is still immensely popular.
Gundam Front Tokyo is a mecca for Gundam fans, or anyone who likes or even used to like manga. It's full of artwork, models, rotating exhibitions and a cool planetarium like theatre where they show CGI Gundam movies.
When you first walk into Gundam Front, they have a room with tons of models on display in glass cases.