“It's just trees,” lamented one unhappy 1-star reviewer who was writing about… a national forest. Don't you hate when you visit the outdoors, and the outdoors are there? Crazy how that works. These people decided to visit our nation's many great national parks, and they then proceeded to leave very funny, and very unhinged 1-star reviews about them. The funniest to me are the ones where people get the location entirely wrong. For example, one reviewer was frustrated because their “Milkshake was…