A GREAT list of places to take your kids before they're grown. Most of them are in the US and are environmentally or historically significant. Also offers suggested ages for experiences and websites with further information. GREAT RESOURCE!!!
Lello & Irmao in Porto, Portugal usually makes the various lists of The Top 10 Most Beautiful Bookstores in the World. It opened in 1906 and features stunning Art Deco woodwork, a stained glass ceiling, and ornate shelving with a dramatic staircase up the center of the store.