You don’t have to be an adventurer to appreciate the exhibits mounted at the National Geographic Society’s headquarters. It helps, though, if you’re a curious soul and admire the natural world. Consider recent exhibits: “Peruvian Gold,” and ““Sharks,” showcasing the work of National Geographic photojournalist Brian Skerry in displays of large-scale images, artifacts, videos, and models of sharks. National Geo also offers lectures, films, and performances throughout the year. Certain photography exhibits and events (the once-a-month Tuesdays at noon film series) are free, but most charge what I consider to be a pretty hefty admission, $11 per adult and up.