Sample link to a Google Panorama from Developer page.
https://www.google.com/maps/@?api=1&map_action=pano&pano=4U-oRQCNsC6u7r8gp02sLA&heading=185&pitch=66&fov=90
https://www.google.com/maps/@?api=1&map_action=pano&pano=CAoSLEFGMVFpcE5kVHZWM05IWUszSDlabUpsVTNqVGxXczZYN0RaUVJuZjQwZjY2&heading=185&pitch=-40&fov=90
Russian Far East
https://www.google.com/maps/@?api=1&map_action=pano&pano=F:AF1QipN224nyXR5nVTdXNfPpX9aCOvAb0oOu-OtCQyYV
https://www.google.com/maps/@?api=1&map_action=pano&pano=AF1QipN224nyXR5nVTdXNfPpX9aCOvAb0oOu-OtCQyYV