If you're looking for something to do this weekend, you may want to visit a national park.

And the good news is you'll be able to get in for free.

Saturday marked the start of National Park Week, and so to celebrate, officials are offering free admission all weekend to any of the 401 national parks throughout the United States.

The National Park Service has joined with the National Park Foundation, the official charity of America's national parks, to present the week, which runs April 19-27.

For a list of Florida parks, go here.