Gorsam Chorten (Stupa) is at Zemithang 90 kms from Tawang. 
It is a 100 ft high stupa built in 12 century AD by Monk Lama Pradhar. It is built to resembles  5 century AD, Boudhnath Stupa in Nepal. Chendebji Chortan in Bhutan is of similar design.
<a href="//commons.wikimedia.org/wiki/User:Prof_Ranga_Sai" title="User:Prof Ranga Sai">Prof Ranga Sai</a>
<span class="int-own-work" lang="en">Own work</span>