National Parks I have visited so far

Shot somewhere in (Titus Canyon?) Death Valley National Park with a Nikon 24-70mm lens (@40mm) on Nikon D5100. Color saturation/constrast boosted in Adobe Lightroom / Photoshop.

There was a sign (all in uppercase letters) where this was shot. The sign said:

Petroglyphs:
Indian rock carvings are found throughout the western hemisphere. Indians living today deny any knowledge of their meaning. Are they family symbols, doodlings, or ceremonial markings? Your guess is as good as any. Do not deface - they cannot be replaced.

Death Valley National Park is my favorite national park in the US. Been there at least a dozen times, if not more. Wikipedia's List of national parks of the United States lists all 60 (so far) National Parks in the US. Of the 60, I've only been to 20, if I include Gateway Arch (the newest National Park, having been added to the list of national parks on Feb 22, 2018). I've been to Gateway Arch many years before it became a national park.

The list of national parks that I've visited so far:

Petrified Forest
Grand Canyon
Death Valley
Yosemite
Lassen Volcanic
Rocky Mountain
Everglades
Haleakala
Mammoth Cave
Acadia
Gateway Arch*
Theodore Roosevelt
Cuyahoga Valley
Crater Lake
Congaree
Great Smoky Mountains
Zion
Canyonlands
Arches
Shenandoah

Forty national parks left to see, so little time. ☹️