Deer Cave
Encyclopedia
Deer Cave is located near Miri
Miri
Miri is a city in northern Sarawak, Malaysia, on the island of Borneo. It is the second largest city in Sarawak, with a population of about 300,000, and the government administrative centre of Miri District in Miri Division....

, Sarawak
Sarawak
Sarawak is one of two Malaysian states on the island of Borneo. Known as Bumi Kenyalang , Sarawak is situated on the north-west of the island. It is the largest state in Malaysia followed by Sabah, the second largest state located to the North- East.The administrative capital is Kuching, which...

, Malaysian Borneo and is a show cave attraction of Gunung Mulu National Park
Gunung Mulu National Park
Gunung Mulu National Park near Miri, Sarawak, Malaysian Borneo, is a UNESCO World Heritage Site that encompasses incredible caves and karst formations in a mountainous equatorial rainforest setting...

. It was surveyed in 1961 by G.E. Wilford, of the Malaysian Geological Survey, who predicted that Mulu would yield many more caves in the future (Wilford, 1964). The cave, which is also known as Gua Payau or Gua Rusa by the local Penan and Berawan people, is said to have received its name because of the deers that come to the cave to lick salt-bearing rocks (Tsen, 1993) and shelter themselves.

The cave was surveyed for the first time in the year 1978, producing measurements of 174 m wide and 122 m high in one section that passed through the mountain for a distance of one kilometer. Subsequently a next survey increased the acknowledged passage length to 4.1 kilometers and connected Lang Cave, another show cave within the park, to the Deer Cave System. This survey made in 2009 by the Hoffman Institute of Western Kentucky University revealed the maximum cross sectional area to be in the large southern passage. This was documented at 169 m wide with a ceiling height of 125 m. The northern passage registered the greatest ceiling height at 148m with a cross sectional width of 142 m. The main entrance of Deer Cave was measured at 146 m.

Geologic history

An explanation of the cave's formation is strongly interconnected with the geological history of the island of Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

 itself. Between 40,000,000 B.C. and 20,000,000 B.C., a 1500 m thick layer of sedimentary rocks known as limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

, composed largely of compressed sea shells, developed in lagoons created by coral reefs. The movement of the Asian and Australian tectonic plates caused the crust to buckle and elevate the land once more, giving birth to the island of Borneo and the Mulu mountains, around 5,000,000 B.C. Since then, the landscape was hacked by constant erosion
Erosion
Erosion is when materials are removed from the surface and changed into something else. It only works by hydraulic actions and transport of solids in the natural environment, and leads to the deposition of these materials elsewhere...

 from precipitations and winds. The mountain’s surface is composed mostly of limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

, which dissolves when in contact with fresh-water, and thus has been slowly sculpted into a karst
KARST
Kilometer-square Area Radio Synthesis Telescope is a Chinese telescope project to which FAST is a forerunner. KARST is a set of large spherical reflectors on karst landforms, which are bowlshaped limestone sinkholes named after the Kras region in Slovenia and Northern Italy. It will consist of...

. Rainwater also infiltrates the porous sedimentary rocks after going through the soil and progressively dissolves the limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

, widening the pores and cracks and creating caves of impressive dimensions such as the Deer Cave. This natural process, which is still working, will cause the cave to widen even more in the future.

Access and tourism

Tourism access to the cave (and to the entire park) was opened in 1984. The landscape attracts around 25,000 visitors from countries all over the world every year.

To access Deer Cave, one must first enter the Gunung Mulu National Park, by way of the nearby city of Miri. Malaysian Airlines operates flights of approximately 45 minutes from Miri to Mulu. The park can also be reached by boat from Marudi, but a special booking must be made since no regular boat covers that area.

You can access the Deer Cave by following a three kilometer plank walk, which passes through various places like a swamp, limestone outcrops, etc. This walk is considered an additional attraction to visitors as it takes them through the rainforest (of about 55,000 ha
Hectare
The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...

) and by an ancient Penan Burial Cave.

The interior of the cave is lit, but flashlights are recommended for personal use in darker areas.

There is also an area of the cave known as the Garden of Eden, named as such due to rich green vegetation made possible by a hole in the roof providing a small amount of sunlight. Visitor attention may also be drawn to a specific formation which bears a distinct resemblance to the profile of Abraham Lincoln
Abraham Lincoln
Abraham Lincoln was the 16th President of the United States, serving from March 1861 until his assassination in April 1865. He successfully led his country through a great constitutional, military and moral crisis – the American Civil War – preserving the Union, while ending slavery, and...

.

Fauna

In 2008, Prince Albert II
Albert II, Prince of Monaco
Albert II, Sovereign Prince of Monaco is the head of the House of Grimaldi and the ruler of the Principality of Monaco. He is the son of Rainier III, Prince of Monaco, and the American actress Grace Kelly...

 of Monaco visited the Gunung Mulu National Park to launch a new camera system as part of the Bat Observatory, which is located near the entrance of the Deer Cave. Known as the Bat Cam, the surveillance technology allows visitors and scientists to observe the millions of bats (over 30 species) that live inside the Deer Cave without affecting their habitat or habits, providing a valuable tool for the study of cave fauna.

The Deer Cave derives its name from an uncommon species of deer, native to Malaysia, which make their home largely in the immediate area of the cave. Additionally, many other animals such as the rhinoceros hornbill, bearded pig, sun bear, and gibbon are native to the local area.

Surroundings

Deer Cave was known as the largest cave passage in the world until the discovery of Son Doong Cave
Son Doong Cave
Son Doong cave is a cave in Phong Nha-Ke Bang National Park, Bo Trach District, Quang Binh Province, Vietnam. The cave is located near the Laos-Vietnam border . It has a large fast-flowing underground river inside.The cave was found by a local man named Hồ-Khanh in 1991...

 in Phong Nha-Ke Bang National Park in Vietnam. It is part of the Gunung Mulu National Park
Gunung Mulu National Park
Gunung Mulu National Park near Miri, Sarawak, Malaysian Borneo, is a UNESCO World Heritage Site that encompasses incredible caves and karst formations in a mountainous equatorial rainforest setting...

, a UNESCO World Heritage Site characterized by amazing caves and karst formations in a mountainous equatorial rainforest
Rainforest
Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

 setting. There are numerous other caves around the Deer Cave, but only three are well-known and open to the public: the Clearwater, Wind and Lang caves.

The Clearwater cave, with approximately 60 kilometers of known passages, is considered the longest cave system in Southeast Asia. It is recognized for its clear underground stream, popular with tourists. The Wind cave is located on the same trail leading to Clearwater cave, and is known for its blowing wind. It contains a chamber dubbed King’s Room, a cavern containing huge columns of stone on both the ceiling and the floor. The Lang cave is the smallest of the caves open to the public. However, its size allows up-close opportunities to see some of the common cave inhabitants such as bats and swiftlets.
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