Just before sunrise on the outer rim of Sibayak (Daniel Quinn, August 2011)
The view just before sunrise from the outer rim of Sibayak (Daniel Quinn, August 2011)
The Antene Peak on Sibayak just before dawn (Daniel Quinn, August 2011)
The crater lake and fumaroles on Sibayak (Daniel Quinn, August 2011)
The never-visited highest point of Sibayak hides beyond the crater peaks (Daniel Quinn, August 2011)
Early morning clouds roll over Sibayak (Daniel Quinn, August 2011)
Gunung Pintau - the rarely-visited wild true high point of the Sibayak mountain range (Daniel Quinn, August 2011)
The top of Antene peak on Sibayak (Daniel Quinn, August 2011)
The cement pillar on Antene peak on Sibayak (Daniel Quinn, August 2011)
View from Antene peak on Sibayak (Daniel Quinn, August 2011)
Hikers at the top of Antene peak on Sibayak (Daniel Quinn, August 2011)
View from Antene peak on Sibayak along the outer rim (Daniel Quinn, August 2011)
View from Antene peak on Sibayak along the outer rim with Sinabung in the distance (Daniel Quinn, August 2011)
View from Antene peak on Sibayak to the crater lake and Sinabung in the distance (Daniel Quinn, August 2011)
Descending from Antene peak on Sibayak to the crater lake (Daniel Quinn, August 2011)
View to Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
Sibayak crater lake (Daniel Quinn, August 2011)
View of Antene peak on Sibayak from the crater lake (Daniel Quinn, August 2011)
View from Sibayak crater lake (Daniel Quinn, August 2011)
Sibayak crater cliffs (Daniel Quinn, August 2011)
Climbing to the Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
Early morning sunliht and mists seen from Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
View of crater lake from Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
View of Sinabung from Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
The summit area of Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
View of the true highpoint - Gunung Pintau - from Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
View of the crater lake from Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
The summit rocks of Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
Sinabung as seen from near the top of Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
The top of Tapal Kuda peak on Sibayak, Gunung Pintau beyond (Daniel Quinn, August 2011)
View from near the top of Tapal Kuda peak on Sibayak (Daniel Quinn, August 2011)
Gunung Pintau - the rarely-climbed true peak on the Sibayak mountain range (Daniel Quinn, August 2011)
Descending from Sibayak's Tapal Kuda peak (Daniel Quinn, August 2011)
Sibayak seen from Semangat Gunung (Daniel Quinn, August 2011)
Wisma Sibayak in Brastagi - the perfect base for climbing Sibayak (Daniel Quinn, August 2011)
View of Sibayak from Gundaling Hill, Brastagi (Daniel Quinn, August 2011)
Gunung Sibayak (unknown photographer, 1920-1925) Courtesy TropenMuseum Archives
Gunung Sibayak (unknown photographer, 1900-1930) Courtesy TropenMuseum Archives
Man at the top of Gunung Sibayak (unknown photographer, 1920-1925) Courtesy TropenMuseum Archives
Gunung Sibayak and Batak houses (Karl Josef John, 1925) Courtesy TropenMuseum Archives
A Batak man on Gunung Sibayak (Karl Josef John, 1925) Courtesy TropenMuseum Archives
Gunung Sibayak (Karl Josef John, 1925) Courtesy TropenMuseum Archives
Gunung Sibayak from Berastagi (unknown photographer, before 1931) Courtesy TropenMuseum Archives
Postcard of Sibayak crater c.1900 (unknown photographer)
Gunung Sibayak (Chris Whiting, December 2010)
Sibayak as seen from the slopes of Sinabung (Daniel Quinn, April 2011)
Sunrise over Sibayak as seen from the slopes of Sinabung (Daniel Quinn, April 2011)
Sibayak as seen from Sinabung (Daniel Quinn, April 2011)
Sibayak from Sinabung (Daniel Quinn, April 2011)
