Dense clouds of methane that cause violent storms often occur on the largest moon of Saturn, Titan. And most likely we will find other meteorological phenomena, such as heavy rains of liquid methane (whose drops must be larger than those of rainwater on Earth), lightning and thunder and the rainbow ...
River and lake, Titan
Digital work
Aequatoria Titan
Digital work
Bonestell revisited
Digital work
I am convinced that the famous Titan's landscape painted by Chesley Bonestell does exist, although perhaps under different atmospheric conditions.