It's The " Lake of no return" situated on the Indo Myanmar border in Pang Sau district of Myanmar.
It's just a 3hrs journey from Dibrugarh (Assam).
But to reach there you should follow certain rules and regulations which are as follows-
1) Carry your valid I'd proof ( DL/Pancard/Adhar card/Passport)
2) You should take an Inner line permit for entering into Arunachal Pradesh.So you can have the ILP From Arunachal tourism department in Mohanbari (near Dibrugarh Airport)
Just having these head off towards your destination.
The journey is full of adventure and eerie roads and on the way you will find a war memorial which is basically a Japanese cemetery.
YOU CAN ONLY VISIT PANG SAU ON 10th/20th/ And 30th of any month AND TRY TO REACH BORDER BEFORE 11AM OR ELSE THE BORDER ARMY WON'T ALLOW YOU To ENTER.
After crossing border at Nampong( Arunachal)
you'll find the Lake of no return where you can spend some time boating there and try some Burmese delicacy in their markets and also don't forget to try the sweet peanuts because it's indegenous to it .
Although you can visit anytime of the year but the best time is On December 30th most probably when they celebrate Pang sau festival.