Probably my favorite ride in Kennywood Amusement Park in West Mifflin, PA, the Thunderbolt is an absolute classic, built in 1924 and originally named The Pippin.
"The Thunderbolt was rated the #1 roller coaster by the New York Times in 1974, and it still is the most popular ride at Kennywood." - Source: Wikipedia
As for the shot, this was obviously a night handheld shot, and I'm very very impressed with the 5D Mark 3's night resolving capability. I posted a daytime shot similar to this a long while ago, but not from this straight-on vantage point, which I like much better. Since you can only get convenient access to the very popular Potato Patch at night, this was the best time for this shot.