Siluria

Siluria was a planet chosen by the Eleventh Doctor for the dinosaurs on the Silurian Ark to live on, after saving them from crashing to Earth in 2367. Apart from humanoid Silurians and isolated specimens such as Torchwood Three's pterodactyl which was presumably killed by Johnson's bomb, Siluria was the home of the only known terrestrial dinosaurs since Adric and Cybermen crashed Captain Briggs' freighter into the Yucatan circa 65.5 Ma. (TV: Dinosaurs on a Spaceship, Earthshock)

Brian Williams visited Siluria and sent back a hand-drawn postcard to Rory and Amy. (TV: Dinosaurs on a Spaceship)