The Las Vegas Springs Preserve, Nevada, which is designed to show Las Vegas' past and provide a glimpse at a sustainable future, opened in June 2007 at a cost of $250 million. It's close enough to see the stunning skyline of the lavish resorts featuring dancing fountains on the Strip, but a world away when meandering from trail to gallery to garden. The entry is free to the eight acres of demonstration gardens and 1.25 miles of trails now open and winding through an area with native plants, bird and animals.