Twisted Colossus
This roller coaster began as a wood coaster, but was heavily modified when it was converted into a steel coaster in 2015.  For example, its original first drop descended at about a 40° angle, a somewhat leisurely descent.  After the modifications, trains still drop 115 feet, but the initial plunge is now at a dramatic 80° angle.  From some angles, it almost looks as if the green and blue rails go straight down the first hill.

©2017 Joel A. Rogers.