5700 Cottonworth Ave., Baltimore; 410-433-8300. The historic Meadowbrook Swim Club was built in 1930 by the George Morris Co. in Baltimore’s Mount Washington area. Aside from being Michael Phelps’ hometown practice pool, Meadowbrook also offers a 50-meter-long pool, a children’s outdoor pool, an indoor therapy pool, indoor hot tub and heated indoor and outdoor pools. Along with plenty of options, guests also have plenty of time — the pool stays open until Nov. 1. Seasonal or yearly memberships are offered.