Unakoti Heritage site, TripuraUnakoti means one less than a crore and it is said that many rock-cut carvings are available here.
Sri Surya Pahar, AssamThe site is a hilly terrain where several rock-cut Shivalingas, votive stupas, and the deities of Hindu, Buddhist, and Jain pantheon are scattered in an area of about one km.
Stone Memorial of U-Maw Thodur-Briew, Meghalaya Built of large megalithic stone, the stones are classified as menhirs (vertical stones), dolmens (horizontal stones), and cairn, with menhirs usually the most gigantic in size.
Thembang Fortified Village, Arunachal PradeshThembang is home to many historical structures, with the most important being the 12th-century Dzong (fortified building).
Ahom Raja's Palace, AssamGarhgaon was the home of the Alom dynasty. The palace was built by king Rajeswar Singha in 1752 CE.
Willong Khullen Megalithic site, ManipurLocated in the Willong Khullen village, a group of massive stone erections lies on a hill slope only 39 kms from Maram village.
Megalithic Bridge on the Um-Nyankanah, MeghalayaAccording to local legends, the Jaintia Kings gave orders to build this bridge during the medieval period.
Pilak Archaeological Site, TripuraThe place is a treasure house of Buddhist and Hindu sculptures. There runs a hilly rivulet near the place which is known as Pilak Stream.