3. Icy Straight Point, Alaska
This zip line claims to be the largest in the world and it may be just that, offering six separate one-mile lines. Six riders at a time take to the top and drop 1,300 feet over 90 seconds. Average speeds hit about 65 miles an hour but the record to date is 82 miles per hour. The ride starts with a 45 minute tour and an eight mile bus ride to the top of the mountain. The views are unparalleled; rugged treetops, mountain peaks and ocean views.

4. Gravity Canyon, New Zealand
Fly superman style on this awesome Kiwi thrill (one of many). This zip line, dubbed the Flying Fox, can have riders hitting speeds up to 100 miles per hour along 3,600 feet. “Zippers” will pass over the Rangitikei Canyon looking into the riverbed nearly 600 feet below. The course runs under a bridge and up towards a cliff face. This isn’t a one way system; you roll back and forth a few times until you stop in the middle. Then the crew pulls you back in, so you can get back in line to do it all over again.
