I watched this a couple of weeks ago on Amazon Prime
It revolves around a corporation surveying a section of land that is traditionally a sacred site for the native peoples. The corporation wants to build a resort on top of it, which always works out well in horror movies. The groups of surveyors find a Japanese machine gun nest left over from WWII and go inside to see how easily it can be demolished - only to become trapped inside with something evil that won't let them leave! Definitely more of a psychological horror movie but I was impressed with it.