I'm currently in a photography class in my school, and have picked up some skills. Mostly rule of thirds, ISO, brightness, leading lines, and distance. Your photos have good framing and contrast. Your leading lines also do good at framing the focal point. Here are a few of my best photos taken near caches. One of them even got a round of applause from my classmates when doing peer reviews.
Golden Minivan
Desert Wanderer
Lake Photo