Hulk Hogan's son, Nick Hogan, found himself in a jail cell early this weekend -- 'cause he got arrested for DUI ... and the location is notable.
According to online records, Nick got busted Saturday morning just before 4 AM in Clearwater, FL -- where cops booked him on suspicion of driving under the influence ... noting he allegedly refused to submit to sobriety testing.
The exact circumstances that led up to the arrest are unclear for now, but they're logging this as a misdemeanor -- and they had Nick pose for this mug while he was being processed.