The Vacation In New Hampshire Road Trippers are making a stop next at, Polar Caves in Rumney. Cool down with us on Thursday (8/7), explore the caves carved out during New Hampshire’s last Ice Age…or bypass the caves on the Boardwalks. Polar Caves is Nature’s Playground, and we’ll be there to tell you all about it, Thursday 10 to 1. Polar Caves, RT 25 in Rumney, just down the road from the traffic circle.