Great family-friendly FREE park: Garden of the Gods in Colorado Springs, CO. Beautiful red sandstone "fins" jut skyward next to the Rocky Mountains. Makes a good daytrip from Denver.
A daytrip by car from Las Vegas, Nevada, to the spectacular South Rim of the Grand Canyon. This once-in-a-lifetime opportunity was provided by the wonderful National Park System in the USA. Breathtaking views and updated amenities, plus a visit to the historic El Tovar Hotel in Grand Canyon Village.