Saddleback in Solon, IA has two back to back par 5s, and actually three out of four in a row!
13: 565 yards, playing into the prevailing wind, with a visually deceptive drive, and OB all the way from tee to green down the left. Its somewhat downhill in the middle, then steeply uphill the last 50 yards with a very wide but shallow multi tiered wild green cut into a hillside that features a huge false front which puts a premium on the approach shot. A three shotter for almost everyone not named Bubba.
15: 549 yards, playing with the prevailing wind, the first 150 or so yards are steeply downhill, then its flat to the green, which is small (and quite shallow from the angle you are approaching it when going for it in two) surrounded by a lot of mounds that make bouncing the ball onto the green quite tricky. I've reached it with as little as a SW but the shorter your approach the harder the wind must be blowing which means reaching the green isn't the challenge, holding it is. I make most of my birdies there chipping back from behind.
16: 553 yards, playing parallel and opposite to 15 it is flat to start and then steeply uphill the last 150 yards and playing into the prevailing wind so its a true three shotter (or more) for almost everyone, and has a far more interesting second shot challenge than most three shot par 5s have. If your layup isn't perfect you'll have a blind approach where you may not even see the top of the flag. If your layup is really bad you have a blind approach from a crazy sidehill lie in the rough!
Back nine is 4-4-3-5-3-5-5-3-4, so you get a 6 hole stretch without a par 4, which is the longest I've ever seen anywhere on a regulation course.