Team Fortress 2/koth lakeside final

Lakeside is a community-created map added by Valve for it's high quality.

Engineer
The best location for a base is in fact the tomb room beside the point. Build a sentry gun in the corner, not facing the point, as a Sentry at the doorway, while being able to cover the point, is easily destroyed by Soldiers and Demomen. A Sentry guarding the tomb also guards the only large health pack and water, forces the enemy to go directly to the point instead of going through the tomb room, and it's close to the point, which also makes it a good spot for a teleporter.