There are a large number of interesting small  islands located off the Borneo coast but Pulau Kakaban is probably the most interesting. Pulau Kakaban is an atoll, the remnant of an extinct volcano with an internal saltwater lake connected  to the sea by an underground channel.

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Ficus tinctoria var tinctoria is locally common on two coral islands of the coast of East Kalimantan but so far not recorded from anywhere else in Borneo. On Pulau Kakaban this fig crawls over  rocky cliffs at the edge of the beach.

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On Pulau Kakaban Ficus tinctoria var tinctoria is at the  very edge of  the western boundary of it’s range, having crossed Wallace’s Line east to west.