The door closing indicator on a London Underground 2009 tube stock Victoria line train. https://www.rawpixel.com/image/6077266/photo-image-light-public-domain-logoFree Image from public domain licenseThe most well-known feature of Zanzibari houses are the finely decorated wooden doors. https://www.rawpixel.com/image/6081871/photo-image-public-domain-plant-buildingFree Image from public domain licenseInside the Class 230 Vivarail D-Train trailer coach which demonstrates some of the possible seating options and also… https://www.rawpixel.com/image/6079329/photo-image-public-domain-windowFree Image from public domain licenseOne of two views inside a Tyne & Wear Metro train that is arriving at Monument station - this view shows the inside after… https://www.rawpixel.com/image/6091831/photo-image-public-domain-personFree Image from public domain license