observation point; observation site
A location where observations are made, such as for weather, astronomy, or scientific monitoring.
The Japan Meteorological Agency has set up observation points across the country.
The summit of this mountain is used as an observation site for astronomical observation.
観測所 is an observatory or observation station (often a building), while 観測地点 is a more general term for any observation point or site.
Compound of 観測 (observation) + 地点 (point, site).