Thung Yai Naresuan

Established in 1974, Thung Yai Naresuan Wildlife Sanctuary is now listed as a UNESCO World Heritage Site. But, the Site is threatened. Year by year, a growing number of people living in the near vicinity of the 3200 sqkm area take advantage of its rich resources. Illegal hunting is rampant and farming activities chip away acre by acre every year. Some blame it on the local Karen community, some on the government, others on the forestry department. Fact is: The blame rest on all of them and accusations make the round rather than attempt to find sustainable solutions. The UNESCO has threatened to remove the heritage status from the park, something that would definitely be its death sentence. Thung Yai is still home to many rare mammal species and birds: Elephants, tigers, hornbills, gibbons, etc...
Entrance into the park is (unfortunately) very relaxed. Even off-road rallys spoil the peaceful valleys every dry season, when childish, rich Bangkokians think that they must prove to their friends that the vehicle can survive the challenge. Walking through the park in any direction would be a challenge, to say.
Though Thailand speaks of greener tourism and eco trips, Thung Yai has not seen much of it yet. Some tour operators simply exploit the term "green" and keep oncashing in on Thung Yai's resouces. What a shame. 
Not as unspoiled as it seems...
Thung Yai's fauna is threatened
Remote and adventurous: Takien Thong waterfall cascades