Malaysia is a federal constitutional monarchy in Southeast Asia. It consists of thirteen states and three federal territories and has a total landmass of 329,847 square kilometres (127,350 sq mi) separated by the South China Sea into two similarly sized regions, Peninsular Malaysia and Malaysian Borneo. Land borders are shared with Thailand, Indonesia, and Brunei, and maritime borders exist with Singapore, Vietnam, and the Philippines. The capital city is Kuala Lumpur, while Putrajaya is the seat of the federal government. In 2010 the population exceeded 27.5 million, with over 20 million living on the Peninsula.
Malaysia has its origins in the Malay Kingdoms present in the area which, from the 18th century, became subject to the British Empire. The first British territories were known as the Straits Settlements, whose establishment was followed by the Malay kingdoms becoming British protectorates. The territories on Peninsular Malaysia were first unified as the Malayan Union in 1946. Malaya was restructured as the Federation of Malaya in 1948, and achieved independence on 31 August 1957. Malaya united with Sabah, Sarawak, and Singapore on 16 September 1963, with si being added to give the new country the name Malaysia. However, less than two years later in 1965, Singapore was expelled from the federation. Since independence, Malaysia has had one of the best economic records in Asia, with GDP growing an average 6.5% for almost 50 years. The economy has traditionally been fuelled by its natural resources, but is expanding in the sectors of science, tourism, commerce and medical tourism. (from http://en.wikipedia.org/wiki/Malaysia)
There are various beautiful national parks in Malaysia. There are many different types of expeditions available, ranging from those where you hardly lose sight of the hotel to those where you are fully immersed in the jungle with only the guide and yourself if you are willing to pay the money! Tours vary from about 4 days to 2 weeks or more. It is very unlikely in most of the national parks for you to see a tiger or an elephant as it is really likely only if you are going to be staying for longer than a few days, i.e., for a couple of weeks at least. One of the most common forms of wildlife that you will encounter in the jungle however are definitely leeches! In the rainforest it is very, very humid but actually it is not incredibly hot. This is because of the large amount of shade afforded by the canopy created by the interlocking trees. Shop around for deals of getting into the jungle and make your decision based on what type of person you are. If you are going to enjoy a lot of hiking without seeing any other people for days or even weeks then you can have that choice, alternatively you can have a much more ‘packaged’ tour in which you will probably stay in a very built up tourist town which has probably just grown out of the demand for people wanting to stay in the jungle.
Malaysia is also well-known for some pristine beaches with great diving opportunities, such as Sipadan off the coast of Sabah and the Perhentian Islands, which are off the coast of northern Terengganu. Coastlines in the less industrialized parts of the country, in general, are well worth driving through for their natural beauty and relaxing seaside kampung (villages), though beware not to swim at any beach which is not protected by capes, lest you be swept away by a powerful undertow.
If zoological exhibits are more your thing or you are visiting with children, there are several well-maintained zoos all over Malaysia that are worth a visit or two, most notably Taiping Zoo, Kuala Lumpur ‘s Zoo Negara and Malacca’s Zoo.
If you are most interested in taking the pulse of a city, Kuala Lumpur’s crazy quilt ultra-modern skyline, including the famous Petronas Twin Towers, is worth visiting. Ipoh may be of more interest if you prefer a somewhat slower paced city that features elegant colonial-era buildings from about 100 years ago, and Malacca is for those who want to trace the colonial and imperial history of Malaysia several hundred years further back. Penang is known for its great food and relatively long-standing and institutionalized Chinese and Indian communities, who share the city with Malay and Thai communities. For a completely different experience, consider going to Kota Bharu to discover a unique conservative Islamic regional culture influenced by Thailand, only a few kilometres away, or visit the diverse cities of East Malaysia, like Kuching and Kota Kinabalu. (much of the above from http://wikitravel.org/en/Malaysia)