The irregular summit profile of Gunung Wilis above fields on its eastern flank. Located between Lawu and Kelud volcanoes, it is surrounded by low-elevation plains on all but its southern side. Wilis formed during three episodes dating back to the mid Pleistocene and the youngest edifice is of Holocene age. Fumaroles and mud pots occur near Lake Ngebel on the lower western flank.

Photo by Lee Siebert, 2000 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Wilis