Attractions in Colorado I've visited (in no particular order):

• Colorado Springs area
  • Cheyenne Mountain Zoo
  • Seven Falls
  • Helen Hunt Falls
  • Garden of the Gods
  • Colorado Wolf & Wildlife Center
  • Cheyenne Mountain State Park
  • Pueblo Zoo
  • Royal Gorge Bridge and Park
• Denver area
  • Wild Animal Center
  • Denver Zoo
  • The Wildlife Experience
  • Downtown Aquarium
  • Denver Center for the Performing Arts
  • The Colorado Convention Center
  • Rocky Mountain Arsenal National Wildlife Refuge
  • Denver Museum of Nature and Science
• To Do
  • Big Cats of Serenity Springs
  • Mission Wolf - summer
  • Wolf Sanctuary(?) - near Ft. Collins
  • Cherry Creek State Park
  • Rocky Mountain National Park
  • Pike National Forest
  • Great Sand Dunes National Park and Preserve
  • Butterfly Pavillion(???)
  • Kangaroo Conservation Center (GA)