A 480-metre walkway through the tree canopy has been built at a national park in Sarawak as part of efforts to promote eco-tourism on Borneo island, officials said today.

The walkway, suspended 20 metres above the forest floor, was built using logs and wires, and is tied to the trees with rope, Sarawak Forestry Corporation spokesman Zulkifli Baba Noor told AFP .

"With the walkway and other new facilities, we hope more people will come to the national park to get close to and appreciate nature," he said.

Other facilities recently installed in the national park at Mount Mulu include new bridges and sensor-activated lighting in the park's caves.

The 52,000 hectare Mulu national park, home to a diverse range of flora and fauna including deer, monkeys, bats and hornbills, was listed as a Unesco world heritage site in November 2000.

The biodiversity-rich area is Sarawak's top eco-tourism attraction, boasting Southeast Asia's longest cave and the world's largest natural chamber which could accommodate 40 Boeing 747 aircraft.