This past weekend my wife and I went to Indiana Dunes State Park. Besides being a beautiful place it is rather unique, it is the only state park in the country contained within the borders of a National Park. That's right Indiana Dunes State Park is contained within The Indiana National Shoreline.

It is on the southern shores of Lake Michigan. The water is beautiful and clear, and great for swimming. It was calm on the days we were there, but often times the waves are quite large. Most of our beach trips are to the ocean and both my wife and I commented on how much we liked swimming in fresh water as opposed to salt water.

We arrived at the park early and were happy to find the prices were very reasonable, especially for Indiana residents.

One of the sand dunes surrounding the park has a lookout tower you can climb. Here is a photograph taken from it showing a view of the main area of the park.

Here you can see the bath house that includes changing areas, restrooms and concessions. This building has a rich history that goes way back the 1930's.

Oops, when I got home and looked at my pictures I discovered I had accidentally taken this selfie.

The Indiana Dunes National Shoreline continues on for 15 miles and is filled with nature trails and observation points. It is a favorite spot for bird watchers who can see hundreds of different species. Here you can see one of the dunes that cuts into a more wooded area.

So I am curious what you think of this hidden treasure and also what your experiences are with fresh water swimming, do you like it more than the ocean. I asked this on Facebook and was surprised by the answers.