Combine Watchtower
From Combine OverWiki, the English Half-Life Wikia
Combine watchtowers are used in City 17, The Coast, and other areas to provide Civil Protection and Combine Overwatch units with a better view of the area below.
They are found almost everywhere around City 17 and near Combine Outposts around The Coast.
[edit] Tactics
These structures give Combine units a better view of an area, so cover near one of these towers is restricted. An easy way of killing any units within these towers are to use the RPG or to simply shoot them, as the tower provides next to no cover.
