I wouldn't sail this ship if I were you
9988 Forbidden spaces
-9988.1 Those that are in plain sight
–9988.11 The middle of busy roads
—9988.111 Those roads that from time to time are cleared of traffic for some great demonstration, so that one may giddily walk their newly crowded spaces
–9988.12 That space in the centre of roundabouts
—9988.121 Those that are desolate and bare, other than a few exhaust-drunk tulips
—9988.122 Those that are wild and overgrown and could host a tent or a very small population of dinosaurs
–9988.13 Those that could be reached by climbing, if climbing were allowed
–9988.14 Those featuring spikes, slippery paint, hostile noises or patrolling guards
-9988.2 Those that one may find out about
–9988.21 Tantalizing things visible on satellite maps, jigsawing into the world you know
–9988.22 Those that one may go to if one wishes, but at some cost to those who believe that no-one should go there
–9988.23 Those that form part of the infrastructure of the city
-9988.3 Those that are dangerous
–9988.31 The cores of nuclear reactors
—9988.311 Those cores that have melted down in famous accidents, glimpsed occasionally by dying robots
–9988.32 The summits of mountains, on planets other than this one
–9988.33 Antarctica in Winter
–9988.34 Warrens of underwater caves
–9988.35 Abandoned mines
–9988.36 The stomachs of huge beasts
-9988.4 Those that are unknown or unreachable
–9988.41 Caves that no longer lead to the surface
–9988.42 Lakes sealed under the ice
