Somehow ice skating looses its romantic zest indoors. At Centennial Lakes Park, for at least three months a year, skaters can feel as if they've fallen inside a Norman Rockwell painting, gliding throughout the park's three main ponds connected by narrow, winding canals. When tired, snuggle up with your partner at the rink-side warming house, where fireplaces crackle at both ends. The ice skating is free, skate rental is $4—and don't miss the chance to rent a Norwegian ice sled. (Where else can you do that?)