Getting fancy now: swim spas

Wish you could fit an Olympic-size pool in the garage? So-called swim spas offer the benefits of a large lap pool in a small space, letting owners swim against a current that circulates through a fiberglass shell, which can be installed either above or below ground. Prices start around $20,000, but higher-end models have features like built-in hot tubs, dual currents and underwater treadmills.