Merrimack Valley is home to wildlife refuge, nature center, and more science fun

A hike through America's Stonehenge in Salem, New Hampshire, is a nature trip like no other. Not only will you find yourself wandering in a beautiful pine forest, you'll also explore an archeological site of the type rarely found in North America. The woods are full of ancient megaliths and stone chambers, which many scholars believe were erected by Bronze Age voyagers who lost their way in the Atlantic and wound up on New Hampshire's shores. Others believe the monuments were erected by Native Americans or colonial farmers. You can decide for yourself. The site includes a small museum where a video presentation gives you some of the history. And be sure to pet the gentle alpacas who share the property.