For some reason doubtless buried in our prehistoric past, most humans find volcanos interesting, as long as they’re not spewing molten rock and poison gas. If you’d like to visit one that has behaved itself for about 10,000 years but still shows the interesting geologic features acquired in its flaming youth, Amboy Crater makes a fine day trip this time of year. The temperature will be 5 to 10 degrees warmer than the same day in Las Vegas, and the route I suggest will take you through the Mojave National Preserve, an agreeable place in early winter.