Masanjor dam is under in Bengal government. It is 45km away from Dumka, you can go by bus, car or bike. It is a historical place. I have visited masanjor many times and every time I wondered to see. You can stay in there but there are not so many hotels. There is no fear of safety, daily thousands of people visit in this dam. If you are planning to do a picnic than this is the best place you can visit