Carlsbad Caverns National Park reopened a couple of weeks back after it had to close due to a freezing pipe that broke. Park officials say that the caverns and park is open under its regular winter hours of 8 a.m. through 5 p.m. If you're in Albuquerque, I highly recommend visiting the park. It's definitely worth the trip.
I visited Carlsbad Caverns 3 weeks ago and it was awesome! Best of all, because we went during an Ice storm, the $10 pass I bought was good for three days. How great is that!?