On top of Doi Inthanon summit there is also Royal Thai Air Force weather radar station and the Thai National Observatory.
If you see the bottom left photo where many coins being thrown...it actually a official stamp on the highest peak of Thailand.
Inside the jungle there is another shrine for one of Royal Air Force Captain who is also a King related. His helicopter went down and killed him in this forest. He is part of the team who contributes towards this national park of Don Inthanon.
Do you see the helicopter propeller remain in that photo?