Three backcountry skiers crossing high mountain pass

These are windmills along Route 580 at the Altamont Pass. It is a form of wind energy or alternative

'Wind energy, Altamont Pass on Route 580 in Livermore, CA'

'Wind energy, Altamont Pass on Route 580 in Livermore, CA'

'Wind Farm at Altamont Pass, CA'

'Wind energy windmills along Route 580, Altamont, California'

'Wooden windmill in foreground with wind turbines, South Dakota'

Half-Dressed Young Woman Sitting on Stone Steps

Three People Ascending Steps and Holding Umbrellas

Woman walking in high heels, cropped view of foot

Woman stepping on artificial turf, crushing gerbera daisy with foot, cropped view

Male and female professionals walking on busy sidewalk, side view

Woman walking in high heels, cropped view of feet

Boy walking along white dividing line, smiling up at camera

USA, California, Yosemite National Park, pool of Tuolumne River

USA, California, Yosemite National Park, pond near summit of Tioga Pass

Asian man in parka waiting on urban doorstep

Man jogging up a staircase

Businesswoman working on laptop outdoors

Man jogging up a staircase

Woman wrapped in towel, smiling, looking away

Woman in skirt holding flowers, cropped view

Female stepping on artificial turf, side view, cropped

El Castillo Pyramid, Chichen Itza, Mexico

Girls walking up steps

Children running in front of school

Germany, Staircase and steps

Ladder leaning against a tree

Germany, Bavaria, Penzberg, extended fire truck ladder

Young boy sitting outdoors with a bowl of strawberries

Young girl sitting outdoors with a bowl of strawberries smiling

Man and young boy sitting on stairs outdoors by windmills looking up

Japan, Takayama, Soyu-ji Temple

Japan, Tokyo, Ueno JR Station, man on top of steps

Stone Staircase

Ladder over stone wall, Lake District, Cumbria, England

Man Walking Down Steps

Restaurant With Neon Lights

Friends in robes walking down stone stairs

Man in robe with mugs

Smiling man sitting on steps

Man sitting on stairs

African businessman sitting on step

African couple taking own photograph

Three young businesspeople

Turkey Ephesus excavation great theater for 24000 spectators

Boy standing on wooden step reaching

Bride sitting on steps with bouquet smiling