February - 2019

The caves of Mulu have been explored for over forty years by a coordinated series of Anglo-Malaysian expeditions which first visited the area in 1978.

Mulu Caves Project red

The Mulu Caves Project is a collaboration between UK speleologists and the Sarawak Authorities, particularly the Sarawak Forestry Corporation, working in association with Gunung Mulu National Park management and staff. This collaboration has been operating since 1978 when a group of 6 speleologists visited the Park as members of the Royal Geographical Society Expedition and established Mulu’s importance as the location of some of the planet’s most extraordinary and vast underground landscapes.

In the 40 years since cavers first visited Mulu, 26 further Anglo-Malaysian expeditions have taken place and dozens of speleologists have contributed to meeting the Project’s aims. Since that first expedition , successive expeditions have been unravelling the secrets of this vast hidden world and yet the full potential of Mulu’s caves has not yet been fully realised – surely there are spectacular discoveries yet to be made.  To date the expeditions have explored and surveyed 435km  of cave passage within the National Park.  Together with a wealth of magnificent karst features this includes; the largest underground chamber, the largest cave passage and the largest cave (by volume) known in the world today.

The Project aims to explore, survey, document and carry out scientific studies of Mulu’s caves, a process that continues to this day and which is summarised on this website.  Here you can read first hand the stories of exploration, learn how the caves have formed, understand the history and see hundreds of photographs from above ground as well as below.

The Mulu Caves Project is coordinated by a small group comprising the leaders of past and present expeditions.  The expeditions are largely self-funded by the  members themselves; they normally take place biannually and last about one month. Preparations are lengthy and involve considerable assistance from the Sarawak Authorities, Sarawak Forestry Corporation officials and National Park management. Once in the field, the expeditions utilise local services and labour for logistical support to ensure that we contribute directly to Mulu’s local economy.

The magnificent Deer Cave. Photo © Robbie Shone