This is the central part of the Java island, dominated by volcanism.
Goa Barat
Goa Jatijajar
Goa Kiskendo Trayu
Goa Kreo
Goa Lawa Purbalingga
Museum Karst Indonesia
Goa Pancur
Goa Petruk
Goa Potro Bunder
Goa Putri Kencono
Goa Seplawan
Goa Tembus Pracimantoro
Goa Terawang
Gua Wareh