In the monastery.
They were all formed at convergent boundaries
Go back to the Himalayas, and now you can climb a rope at the right side (above the helicopter), and go back to the monastery for the lantern.
Climb up to the first snow-covered level, and go left, and he will meet you.
Punjab Himalayas, Kumaon Himalayas , Nepal Himalayas and Assam Himalayas.
Climb up and go left. He is just down the trail at upper left.
At the monastery in the Himalayas. You also need the matches from the pub at Loch Ness.
Punjab Himalayas, Kumaon Himalayas , Nepal Himalayas and Assam Himalayas.
There are matches in the Pub at Loch Ness. Go right from the loch and they are on the bar in the Pub. You will need them for the lantern you get in the Himalayas.
All were formed by plates converging toward Eurasea and closing of the Tethys Sea.
You need the lantern from the Himalayas, and the matches from Loch Ness, so that you can travel in the dark forest at New Jersey.
You can go to any of the sites, but you need a camera from Loch Ness to use at the Himalayas, and the matches from the pub to use with the lantern from the Himalayas when you go to New Jersey. So the best plan is to visit them in order: Loch Ness (get the rowboat photo), then the Himalayas (get the photo and lantern), then Puerto Rico (get the bolt cutters and fur sample). Then go back to Mews, then to any of the three (not the Himalayas) to finish it.