You’ll set out against a backdrop of Austin’s skyline and the state capitol, then move upstream past Barton Creek and Zilker Park, along the way glimpsing 100-foot-high cliffs and million-dollar estates. These scenic tours, accompanied by knowledgeable narrators, last about 90 minutes; slightly shorter bat-watching tours leave around half an hour before sunset. For a romantic experience, hop aboard the BYOB Moonlight Cruise and enjoy the lights of the city under the stars.