One of the main locations in Fraggle Rock, this cave is shared by best friends Gobo and Wembley Fraggle. Their beds are holes carved into the cave wall, Wembley's up above (which he accesses using a ladder) and Gobo's below. There is also a nook where they build a fire.
The cave that would become Gobo and Wembley's room has a long history in Fraggle Rock. It used to be a jail, back in ancient times when Fraggles still had such things. Many years later, it was the home of young Traveling Matt (top bunk) and his Uncle Gobo (bottom bunk).
Matt ultimately inherited the cave, where he raised his nephew Gobo. When Matt left for Outer Space at the beginning of the series, Wembley moved in with Gobo, creating the arrangement that spanned the rest of the series.