Active geysers have been observed in the south polar region of Mars:

Martian Geysers.
http://en.m.wikipedia.org/wiki/Martian_geyser

A new program asks the public to help identify them:
Scientists need you to analyze unseen images of Mars.
By James Holloway
January 15, 2013
http://www.gizmag.com/planet-four-analyze-mars/25801/

http://planetfour.org/#/about

BTW, the current theory is they are formed by CO2 sublimation. I
raised the possibility that subsurface liquid water is involved in
their formation:

North polar geysers?
http://cosmoquest.org/forum/showthre...32#post1040432

Bob Clark