The world has outdoor and indoor rooms, as well as underground caves and tunnels. There are buildings, forests, streets, and places only for those who are not faint of heart. The Adult Area is defined as areas where most anything goes that is consensual with any others involved. Access to this area is limited to those who are over 18 years of age. Building on most mucks is a given.
Players can build.
Here, players do not automatically have this capability, and can earn it through roleplay.