My husband and I want to take my mom for her 60th somewhere special in late December. We would fly from Manhattan, NY. But we wondered if anyone could tell us just how cold it would be and if there are many activities we can do indoors and if traveling to and from places would be fairly easy. My mom is healthy and can do a good amount of walking. She doesn't have too many hobbies but does enjoy traveling and seeing new places. Advice please?