Visit the house of the tribal chief (Angh). Whats unique? Half of his house is in India and half in Myanmar! No, you don't need a Myanmar visa to visit his house!
Held every year from April 1-6, the main function is usually on the 6th, but it could differ, better to check in advance. You can enjoy the preceding of this fun and frolic festival at Longwa in its true glory.
Here's one of the border markers which allows you to step into Myanmar from one side and the other side you're back to India! Make sure to visit any of these..the views are spectacular!