Image Credits

Cover photos used on National Park pages.

Park	Image	Credit
Grand Canyon National Park	Dawn light slowly illuminating the layered canyon walls from the South Rim	DAVID ILIFF, Wikimedia Commons (CC BY-SA 3.0)
Great Smoky Mountains National Park	Layer after layer of blue-grey ridges fading into the mist of the Great Smoky Mountains	National Park Service / Wikimedia Commons (Public Domain)
Yellowstone National Park	Grand Prismatic Spring from above — rings of blue, green, yellow, and orange	Jim Peaco, National Park Service (Public Domain)
Yosemite National Park	Half Dome at golden hour seen from Glacier Point, with the valley below	Diliff, Wikimedia Commons (CC BY-SA 3.0)
Zion National Park	Zion Canyon viewed from the exposed summit ridge of Angels Landing	National Park Service (Public Domain)

Inline article images

Photos embedded within park guides, all sourced from Wikimedia Commons.

Park	Image	Credit
Grand Canyon National Park	Scenic view of the Grand Canyon from Mather Point on the South Rim	Tuxyso, Wikimedia Commons (CC BY-SA 3.0)
Grand Canyon National Park	The Desert View Watchtower at Grand Canyon National Park	Anita Walz, Wikimedia Commons (CC BY-SA 4.0)
Grand Canyon National Park	Grand Canyon panoramic view from Hopi Point at sunset	APK, Wikimedia Commons (CC BY-SA 4.0)
Grand Canyon National Park	View into the Grand Canyon from the South Kaibab Trail ridgeline	P. Hughes, Wikimedia Commons (CC BY-SA 4.0)
Grand Canyon National Park	Bright Angel Trail descending from the South Rim of Grand Canyon	Hermann Luyken, Wikimedia Commons (Public Domain)
Grand Canyon National Park	Havasupai Garden (Indian Garden) campground and cottonwood trees in the Grand Canyon	Michael Quinn, NPS (Public Domain)
Great Smoky Mountains National Park	Cades Cove open meadow with Appalachian ridges in Great Smoky Mountains	Warren Bielenberg, Wikimedia Commons (CC BY-SA 2.0)
Great Smoky Mountains National Park	Abrams Falls wide cascade with swimming hole at Great Smoky Mountains National Park	Darlene Leach / NPS (Public Domain)
Great Smoky Mountains National Park	Alum Cave Bluffs overhanging concave cliff formation, Great Smoky Mountains	Brian Stansberry, Wikimedia Commons (CC BY 3.0)
Great Smoky Mountains National Park	Clingmans Dome spiral observation tower at 6643 ft, Great Smoky Mountains	Scott Basford, Wikimedia Commons (Public Domain)
Great Smoky Mountains National Park	Grotto Falls with trail passing behind the water curtain, Great Smoky Mountains National Park	Brian Stansberry, Wikimedia Commons (CC BY 3.0)
Yellowstone National Park	Old Faithful geyser erupting, steam column against blue sky at Yellowstone	Daniel Mayer, Wikimedia Commons (CC BY-SA 3.0)
Yellowstone National Park	Lower Falls of the Yellowstone River from Artist Point — 308 ft drop into yellow canyon walls	Chris Light, Wikimedia Commons (CC BY-SA 4.0)
Yellowstone National Park	Yellowstone River meandering through the open grassland of Hayden Valley	NPS (Public Domain)
Yellowstone National Park	Layered travertine terraces at Mammoth Hot Springs, Yellowstone National Park	W. Bulach, Wikimedia Commons (CC BY-SA 4.0)
Yellowstone National Park	Bison herd with calves on the open grassland of Lamar Valley, Yellowstone	NPS (Public Domain)
Yosemite National Park	Tunnel View panorama — El Capitan on the left, Half Dome center, Bridalveil Fall on the right	Diliff, Wikimedia Commons (CC BY-SA 3.0)
Yosemite National Park	Vernal Fall (317 ft) on the Mist Trail, Yosemite National Park	Paxson Woelber, Wikimedia Commons (CC BY-SA 3.0)
Yosemite National Park	Glacier Point viewpoint at sunset with Half Dome opposite, Yosemite National Park	Diliff, Wikimedia Commons (CC BY-SA 3.0)
Yosemite National Park	The Grizzly Giant — a 2,700-year-old giant sequoia in Mariposa Grove, Yosemite	Mike Murphy, Wikimedia Commons (CC BY-SA 3.0)
Zion National Park	Court of the Patriarchs — three towering Navajo Sandstone peaks in Zion Canyon	Brandon Price, Wikimedia Commons (CC BY 2.0)
Zion National Park	Hikers wading through the Virgin River in The Narrows slot canyon, Zion National Park	Sakturner, Wikimedia Commons (CC BY-SA 4.0)
Zion National Park	Panoramic view of Zion Canyon from Angels Landing summit, 1488 ft above the Virgin River	Paulvoge, Wikimedia Commons (CC BY-SA 4.0)

Travel post photos are my own.