jalan kayu terpanjang di dunia, muara kaman, kutai kartanegara
muara kaman, kutai kartanegara 16-4-2017, jalan raya dari kayu terpanjang di dunia Muara Kaman Nature RMuara Kaman, Muara Kaman Perairan Sungai Mahakam Nature Reserves, Cagar Alam, eserve comprises an area of 62,500 ha located between the Ketapang Kepala and Menamang Kiwa rivers in East Kalimantan province. The reserve protects a vast area of flat peat swamp. Southwest of Muara Kaman lie the middle Mahakam lakes Danau Semayang, Danau Jempang and Danau Melintang. The lakes are situated in a geological depression covering approximately 400,000 ha. The size of the lakes ranges from zero in extremely dry years to more than 60,000 ha. The area has a very rich bird life and offers prime habitat to endangered Irrawaddy dolphins and Proboscis monkeys. As such, there has been a proposal to protect 200,000 ha of Perairan Sungai Mahakam but this proposal has been rejected in connection with the relatively high population inhabiting the region.