The Sargess Museum
サージェスムーシアム
The museum grounds seem to be a pretty nifty place. We don't really see much of them. Heck, they aren't even in Tokyo.
While I can't be sure the first picture is one place, that the dinosaur bones are in the same building as those elevators, clearly the second two pictures are from opposite sides of the same grounds. Those grounds are in Kanagawa, 県立地球市民かながわプラザ。The Kenritsu Chikyu Shimin Kanagawa Plaza. While the Fukui Prefectural Dinosaur Museum is huge, gorgeous and I'd someday like to go, it would appear the dinosaur exhibits were from The National Science Museum in Tokyo.
The Boukenger Center of Operations
Other Places of Interest
This is the painting at the center of a fairly large-sized outdoor theatre which we've seen in several Sentai. I think this is the name, 所沢航空記念公園の屋外ステージ and this is the address:
This is the Takaoka house where Eiji was born and raised. The house itself is also in Kanagawa, 旧華頂宮邸 I hope to know how the name is said soon. That last kanji means "mansion" which threw a friend of mine into confusion because, in Japan, mansion means an apartment complex. The address is: 神奈川県鎌倉市浄明寺二丁目 My friend says that area is famous for temples.
Now, that first picture I'm pretty sure is CG, and exists nowhere in Japan. I found out where this place in the second picture is but don't need to tell, however the third, which was also used in Dekaranger, is located in Gunma Ken (NOT Kanagawa). It's the Gunma Kenritsu Gunma Tenmondai, location: 群馬県吾妻郡高山村中山。
All righty, I really want to see this place. It looks so interesting! Now, you'll be surprised to know it's also in Kanagawa in Fujisawa City! This is the Shounandai Shimin Theatre, located at 神奈川県藤沢市湘南台一丁目。
Yes, there are websites out there made by obsessive types who like to tell us where things were filmed. Here are links to Boukenger wings:
Boukenger Location Guide
Boukenger on-Location