Nottingham is the city of Robin Hood legends, but many more secrets are hiding inside it, or to be more precise, beneath it. Deep into the ground more than 500 mystic caves are connected with tunnels, creating a whole underground city, known as the City of Caves. These caves date from the 4th century and they were homes and places for different people and activities through years.
What is interesting is that some of the caves have been fully discovered and thoroughly analyzed, while some still haven’t been well explored. On the base of what is known, today there is an application which let us to get inside of this incredible and secret world.