National Parks of the United States 

Acadia, Maine

Everglades, Florida

Glacier, Montana  2014

Grand Canyon, Arizona

Grand Teton, Wyoming  1998 (on the way to Yellowstone)

Haleakalā, Maui, Hawaii

Hawaii Volcanoes, Big Island, Hawaii

Rocky Mountain, Colorado

Yellowstone, Wyoming, Montana, Idaho  1998

Zion, Utah  2009

Glacier Bay, Alaska  2002

Mesa Verde, Colorado  (in Grand Canyon trip)