The MRT Server, which stands for Minecart Rapid Transit, is a creative server in Minecraft focused on city-building and transportation. It has been operational since July 2012 and caters specifically to enthusiasts of these themes. The server is currently on version 1.21.4 and is located in Canada. It is designed to foster a community where players can engage in collaborative construction and exploration, contributing to an ever-growing world enhanced by creative transport systems.