Cypress Valley Canopy Tours. Cypress Valley Canopy Tours zips you through the treetops to experience nature from a bird's eye view. Tucked away in a ravine lined with bald cypress trees, the Canopy Tour leads you along a maze of zip lines and sky bridges. For even more adventure, the Canopy Challenge is an additional course with endurance high ropes obstacles. Bird-watchers may also enjoy the Sunrise Birding Tour, which is guided by a local biologist. 1223 Paleface RR, Spicewood, TX. 512/264–8880. www.cypressvalleycanopytours.com. $65–$125. Mar.–Nov., 9am–sundown.
One of Marble Falls' economic foundations is Granite Mountain. The great granite dome rises 866 feet; its more than 180 acres of exposed granite serve as the largest granite quarry of its kind in the United States. Although visitors are not admitted to the quarry itself, you can get a great view of the mountain from J Street toward 2nd Street.