浅口市, Italy
This is the main campus of Japan's national observatory. Data collection mostly occurs elsewhere, which frees up many of the buildings here for a view. About half of the campus is open to the public. Many buildings are decades old and house equipment used by the observatory decades ago, in a well-pr
eserved state. The entire place is surrounded by forest, and unlike much of Tokyo, it's quiet and peaceful here. Some people bring a sketch pad and draw the buildings. There are no guides. A self-paced tour might take 1-2 hours.
Listen to the audio guide for osservatorio astronomico nazionale del Giappone Free on WIP — starts by itself when you arrive, even with the screen off