Who knew? History can be fun. And the Colorado Historical Society's experts, who know the state like the backs of their own hands, have a great handle on how to impart that knowledge without being the least bit stodgy. Focusing on locations and themes ranging from the bowels of Denver's rapidly disappearing skid row to the throwback tourist havens of Manitou or Eldorado Springs, the year-round tours they lead have the character of a downright lark through time; participants leave at the end of the day feeling both relaxed and informed. Upcoming treks include "A Tasty Tour of Boulder County," featuring visits to local makers of goat cheese, mead and other gourmet oddities, and a three-day summer raft trip following John Wesley Powell's route down the Green River. Make your reservations early.