As of Summer of 2019, there were "glamping" facilities here that housed overnight guests. Company website is provided below for more information.
https://www.collectiveretreats.com/retreat/collective-governors-island-5/#gettingheremap

"скамейка установленная в рамках проекта РГО Краеведческая карта полуострова Старицкого"
OSM snapshot date: 2022-06-13T12:43:18Z
POI has no name
POI types: amenity-bench
#organicmaps

"качели в начале тропы на Черный ключ"
OSM snapshot date: 2022-06-13T12:43:18Z
POI has no name
POI types: amenity-bench
#organicmaps