With its magnificent mountain backdrops, premier golfing and pretty rivers and streams, Vail in summer is not to be missed. One of Colorado's best-known ski resorts, it has more than 5,000 acres of terrain, encompassing rugged mountains and gorgeous waterfalls, and it's a great place for summer hiking or mountain biking. At the top of the Eagle Bahn gondola is Epic Discovery, a vibrant recreation centre home to the Forest Flyer Mountain Coaster, which winds 3,400 feet (1,036m) around the peaks. There's also mini-golf, tubing and bungee trampolining.