Sniper maps

Good evening ET community. Back in the days I used to play on Sniper servers every now and then. This were servers where u played versus other people with snipers only. Always had much fun playing these games. However, I can't remember the names of the maps being played. I was wondering if you could name some popular maps that used to got played in these Sniper servers.

These days, there are only active sniper servers remaining with bots (as far as I know). Therefore, ET United will most likely host a sniper event somewhere next week. Suggestions for sniper configs are also very welcome.

Thanks in advance. See you next week in my sniper sight!