According to CNN, the Yukon Striker will open at Canada's Wonderland amusement park in 2019

It is the BIGGEST "dive" roller coaster in the world.

During the coaster's 245 foot drop (nearly straight down) it will reach speeds of 80 miles per hour.  The trip, which lasts over 3 minutes, will cover 3600 feet (over 1/2 a mile).  On top of that, it will be floorless for "enhanced visibility".

Check out the simulated ride:

Canada's Wonderland is located in Ontario