Lewisville Lake Environmental Learning Area. Often called by the initialism LLELA, this nature preserve hosts family-friendly activities throughout each month. See bison grazing in the wild with an exclusive herd-owner- led tour. Or try out frontier life at LLELA’s restored and furnished 1869 Minor-Porter Log House, where volun- teer docents lead informal tours. LLELA also coordinates summer camps, fishing days, bird walks, and kayaking for kids.