Sibu Besar, the main island, is approximately 6 km long and 1 km wide and for the most part covered by tropical vegetation. On the southern end there is a small fishing village called Kampong Duku with a population of fewer than a hundred people (about 40 families).
The main leisure activities on the island are watersports such as snorkeling and diving - not surprising since the area was designated a Marine Park in 1993 and numerous coral reefs are close to hand.
There are four main beaches on the Eastern side of Sibu where most of the beach resorts are located. Sea Gypsy Village Resort & Dive Base and Sibu Island Cabanas are situated on a beach facing Tinggi Island. Other resorts, such as Rimba Resort, are on the opposite side. Resorts facing the mainland/pick-up point (Tanjong Leman jetty) are Coconut Village Resort, Junansa Villa and Twin Beach Resort. Most of the resorts are closed during the annual 3-month monsoon period save for those facing the mainland.