it's been a long time since I've come across a cool roller coaster to share, but check this out, the first suspended roller coaster, 1902

Bisby's Spiral Airship built in 1902 had cars that were suspended underneath a track and could swing freely. The cars travelled up an inclined track, and then descended along a spiral track around a steel frame tower before returning to the station. This is commonly acknowledged as the first suspended roller coaster type ride.

http://skyscraperpage.com/forum/showpost.php?p=5102941&postcount=2308