All of them are, in part, HDR. They are all created from multiple shots taken using the camera's auto-bracketing feature. The images are carefully merged using layer masks in Photoshop in order to get the proper dynamic range within the Zone System.
Since you guys liked the mountain shots, here's a couple of the Jungfrau Massif, in the Bernese Highlands, Switzerland. Went there this afternoon to the skiing course in First.