Hillsborough, New Brunswick, Canada

For a challenging land adventure, go for a three-hour tour of two wild gypsum caves in Hillsborough. Special adventures await each spelunker in the bat room at the back of the south cave, where the mysteries of the underground world are revealed. The walk to the cave is long and hot, while the interior of the cave is cool, slippery and damp. The Salem & Hillsborough Railroad is a tourist railroad and museum that operates during summer months.