A boardwalk extending across Midway Geyser in Yellowstone National Park, Cle Elum County, Washington, USA

famous place landmark natural landmark national landmark nobody shape curve the americas north america usa us states wyoming diminishing perspective horizontal colour image photography thoroughfare walkway wooden walkway boardwalk material wood land natural land state wilderness area mineral physical structure soil non urban scene landscape outdoors day nature power in nature physical geography travel place of interest travel destinations national park geyser geothermal activity midway geyser yellowstone national park park county