The Museum Mönches Luang Phor Khoon was built to house the spirit of Luang Phor Koon, a famous monk who died in May 2015. Such was his reverence that King Rama IX afforded him special honor, members of the Royal family visiting here on a number of occasions. While the museum is a memorial to his life and works it isn't his mausoleum, at least not yet. He graciously donated his body for research which is currently at Khon Kaen University. His cremation date is yet to be decided. Apart from visuals and mostly religious objects, relating to Luang Phor Khoon’s life and works, there is nothing in English in this museum that would add greater meaning for foreigners.
Update 2-Feb 2019: Finally in the evening of 29 January 2019, during an elaborate ceremony, Luang Phor Koon's body was cremated in Buddhamonthon in Khon Kaen's Muang district. It is understood that his remains will be placed in the Mekong River at Nong Khai. https://www.bangkokpost.com/news/general/1620038/faithful-bid-luang-phor-koon-final-farewell.