HDR photos are at least three photos of the shot combined together by special programming to get the most information out of each photo. One photo is overexposed by 1 or more steps to get the most info out of the shaded areas, one at normal exposure and one at 1 or more steps underexposed to info out of the highlights. This is done with the camera on a tripod and exposure bracketing. Here are the shots I used. After processing and a little creative tweaking this is what I came up with.