Dungeons are areas of 3k which create a copy for you (and/or your closes friends) to explore and fight in without being bothered by other players.
Non Scaling Dungeons
- Icy Blue Portal (lv 5)
- Majong (lv 25)
- Smurfs (under scaler 100)
- Bomb freaks abbey (under some scaler? at scaler 58: guards 16k, elite guards 23k)
Scaling dungeons change in some fashion with player level. How dungeons scale depends entirely on the whim of the coding wizards. Some breakpoints and other player experience can be accessed on the below links.