India, Aug. 23 -- Think you've seen all of India? Think again. From an active volcano and a protected tribal reserve to high-security nuclear research facilities, the country has several places that tourists cannot simply visit like regular destinations. Access to these locations is restricted for reasons ranging from national security to protection of indigenous communities. Here are seven places in India where entry is heavily controlled or prohibited. (Also read: Travel vlogger takes 'world's most expensive first-class flight' from Dubai to London: 'It's literally an apartment' )

Home to India's only active volcano, Barren Island is one of the country's most unusual destinations. While tourists can view the volcano from boats, landing...