National Parks I have visited so far

While watching "National Park" series from Ken Burns, I wondered how many national parks I have visited so far. Out of 58 national parks, I have visited the following --

1. Crater Lake
2. Death Valley
3. Glacier
   
4. Grand Canyon
5. Grand Teton
6. Haleakala
   
7. Kings Canyon
8. Lassen Volcanic
9. Redwood
   
10. Sequoia
11. Yellowstone
12. Yosemite
13. Zion (Dec 2011)

Few more must-to-visit --
Arches
Bryce Canyon
Canyonlands


Here is a complete list.