|Locations of interest|
|Journal-||Riven (game)/Atrus's journal|
|First appearance||Riven (game)|
Crater Island (also known as Boiler Island or Book Assembly Island) was the home of Gehn's office in Riven. It contained a large boiler (which contained a pipe that dumped it out to the sea) and had a large crater with a lake in the center. The island was home to a variety of cave frogs, which offers a clue to one of Riven's major puzzles.