Onsen

== Onsen "bug" ==
Because Onsen lvl. 0 looks like it was already upgraded to lvl. 1, it can be confused for being upgraded to lvl. 2 instead. There has been a few reports of this happening, but they were never confirmed and it always seems to be happening only with Onsen and never with other buildings.
== Trivia ==
*Onsen has "温泉" written on the gate, which is Japanese for "onsen".
*In Japan, onsen is a bathing facility built around a hot spring. The hot sprint water can also contain minerals and chemicals. 
== See also ==
*For more information about buildings in general see Territory.