Tunnel View offers an introductory perspective of the famous features of the Yosemite Valley including El Capitan, Cathedral domes, Half Dome, etc.

On mobile devices click on the cardboard icon to use a VR headset to look around
Look around with directional swipe gestures on touch screens, or use the top-left Google Street View like controls of the YouTube video. Use cardboard or VR headsets if available for more immersive experience.