WWNW? Final Clues

Competition is fierce to guess Where Will Nina Work this summer! For those of you who have not submitted an entry yet, this post offers a few more enticing clues.
Today the sky is the limit. You can submit two entries. For that matter enter three times. You can also change any previous guesses.

Here are the final clues of the contest:
6) Geysers
7) Hot springs
8) Ginormous shallow magma chamber
9) First national park in the US (1872)
 
These clues are so enticing you have no choice but to know the answer.
Winners will be announced on Monday!

IMG_3143 Paintbrush