This map is mainly a creation map but there are also adventures embedded in the map for those interested. Vertoak is a huge city. All buildings got rooms and even many secret ones. Apart from the secret rooms there are also hidden chests and fun signs you can find on your adventure throughout the map. There are no rules to this map - do as you please in a map of really endless possibilities.
Because of the city is so huge it’ll take a good while for you to explore it all, and even at the point you have explored the city as a whole there are most likely part, hidden alleys and such, which you have not seen yet.