These photos are of the Grand Sable Dunes and Log Slide area along Pictured Rocks National Lakeshore in Michigan's upper peninsula.
The spot where I was taking the picture from is almost 300 feet from the water below. It is recommended that if you decide to walk, or slide for that matter, down the dunes, and make the walk back up, you should plan on having at least an hour for the return climb, and you should also not have a heart condition. We decided to enjoy the view from above. Maybe next time we visit, we'll ride on one of the charter boats to get the view from down below.
Back in the late 19th century, this spot was used by loggers who rolled and slid the logs down the dunes on a wooden slide to be loaded on lumber schooners waiting in the cold waters below.