We like this activity and we have been many times on our days off. It is like a nature walk with some quick slides down some zip lines, this will get your adrenaline going (and some light exercise too). This activity is one of the fastest growing eco-adventure style activities. Located upcountry at Kula. The Haleakala Skyline Tour blends a short hiking experience with five picturesque zipline crossings, an “Indiana Jones” style swinging bridge, and an introduction to Hawaii’s unique and fragile landscape. Try the Piiholo Zipline upcountry n the Haleakala ranch.