Jupiter's moon, Io, has more than 400 active volcanoes, making it the most geologically active object in the solar system. Several volcanoes on Io produce plumes of sulfur and sulfur dioxide that rise as high as 300 miles above its surface.
Source: tatoeba (6293966)
Mercury appears geologically inactive.
Source: tatoeba (8800765)
Maybe read the astronomical document "Cassini RADAR images at Hotei Arcus and western Xanadu, Titan: Evidence for geologically recent cryovolcanic activity."
Source: tatoeba (10685448)
The El Dorado-Searchlight area is geologically a north-south trending orogenous zone, paralleled on the east by the valley of the Colorado, and by an alluvial valley on the west.
Source: wiktionary