Standing at Cape D’Aguilar Marine Reserve (鶴咀海岸保護區), people can see Stanley Peninsula / Chek Chue (赤柱半島) just a few miles a away and the “radar stations” on top of the hill quite stand out from the background.
This is actually AsiaSat’s Stanley Earth Station. Six antennas serve as a backup system to the Tai Po Earth Station in New Territories. They are responsible for the communication between Hong Kong and the outside world.
If you want to go there, you need to go through Chek Chue Barracks (赤柱軍營) and an entry permit is required.