What I am seeing in the images are -- at best! -- highly eroded bomb craters with very little value besides maybe as mud holes where water buffalo can soak during the day. If the Thais want to see bomb craters left by the Allies, I invite them to come to the place where my grandparents had their home. The bombs that incinerated their whole city part, including their house, are of course not visible as craters any more, but as the Allied bombers offloaded quite indiscriminately and without much targetting, the surrounding forest literally has hundreds of them, to this day quite well preserved. I played in them hide and seek as a kid, so they had at least some use, but I would not cry if they were bulldozed over.
