Chamoli district. There are plans to launch helipad service in Pantnagar and Jolly Grant Airports and other important tourist destinations like Ghangaria and Hemkund Sahib. As over 86% of Uttarakhand's terrain consists of hills, railway services are very limited in the state and are largely confined to the plains. In 2011, the total length of railway tracks was about . Rail, being the cheapest mode of transport, is most popular. The most important railway station in Kumaun Division of Uttarakhand is at Kathgodam, 35 kilometres away from Nainital. Kathgodam is the last terminus of the broad gauge line of North East Railways that connects Nainital with Delhi, Dehradun, and Howrah. Other notable railway stations are at Pantnagar, Lalkuan and Haldwani. Dehradun railway station is a railhead of the Northern Railways. Haridwar station is situated on the Delhi–Dehradun and Howrah–Dehradun railway lines. One of the main railheads of the Northern Railways, Haridwar Junction Railway Station is connected by broad gauge line. Roorkee comes under Northern Railway region of Indian Railways on the main Punjab – Mughal Sarai trunk route and is connected to major Indian cities. Other railheads are Rishikesh, Kotdwar and Ramnagar linked to Delhi by daily trains. Tourism Uttarakhand has many tourist spots due to its location in the Himalayas. There are many ancient temples, forest reserves, national parks, hill stations, and mountain peaks that draw large number of tourists. There are 44 nationally protected monuments in the state. Oak Grove School in the state is on the tentative list for World Heritage Sites. Two of the most holy rivers in Hinduism the Ganges and Yamuna, originate in Uttarakhand. Binsar Devta is a popular Hindu temple in the area. Uttarakhand has long been called "Land of the Gods" as the state has some of the holiest Hindu shrines, and for more than a thousand years, pilgrims have been visiting the region in the hopes of salvation and purification from sin. Gangotri and Yamunotri, the sources of the Ganges and Yamuna, dedicated to Ganga and Yamuna respectively, fall in the upper reaches of the state and together with Badrinath (dedicated to Vishnu) and Kedarnath (dedicated to Shiva) form the Chota Char Dham, one of Hinduism's most spiritual and auspicious pilgrimage circuits. Haridwar, meaning "Gateway to the God", is a prime Hindu destination. Haridwar hosts the Haridwar Kumbh Mela every twelve years, in which millions of pilgrims take part from all