Image: a screengrab from Morrison's test of the Avus system.
Image: 175798078 © Nuthawut Somsuk | Dreamstime.com
Image: XYZ Reality
Image: 3D Repo
Image: HS2
Image: 191910152 © Antondmitriev | Dreamstime.com
Image: 198113574 © Iurii Motov | Dreamstime.com
Image: 125233508 © Zoltan Gabor | Dreamstime.com