Bolsa Chica Ecological Reserve beckons wildlife-lovers and bird-watchers with an 1,180-acre salt marsh that is home to 315 species of birds, including great blue herons, snowy and great egrets, and common loons. Throughout the reserve are trails for bird-watching, including a comfortable 1½-mi loop. Free guided tours depart from the walking bridge the first Saturday of each month at 9 AM. COST: Free.