No-portal zone

A no-portal zone or no-fly zone is somewhere you cannot normally get to by portaling, flying, or passaging. Often, but not always, it's also impossible to leave by these methods.

To be tested: blue ring out (might work everywhere?), godmother out (should work everywhere), whether you also can or not portal/fly/passage out

No-portal zones include:

Sto Plains

• The Pishe Waterpark in Ankh-Morpork. The restriction applies to entering the water park, not leaving. (The advancement room is a full no-portal zone.)
• The top floor of the Five Ways bell tower in Ankh-Morpork. If you keep climbing you can leave (but still not portal in) from the roof though.
• The Dysk in Ankh-Morpork.
• Apex Club rooms in Ankh-Morpork.
• The center of the garden (hidden) in the Sto Lat Artificers' Academy, and The Hammered Cat tavern inside it.
• Inside the capture the flag castle (everywhere but the moat).
• The beer garden of The Bucket in Ankh-Morpork.
• The lower part of the Grflx caves.

Ramtops

• The Pictsie Barrows island in the Ramtops.

Klatch

• The Djelibeybi real estate agency.
• The Djelibeybi crocodile pit, including the ledge (a punishment location for those killing priests / priestesses / cats in Djelibeybi).
• The strange alleyway in Ephebe.
• Up the desert monolith northeast of Al Khali where the shrivelled tramp hides.
• The rock west of the Oasis in the Ephebian desert and terrain rooms up to 3 rooms away all around it, they are rolling sandy desert marked b instead of the normal +. Can't fly out either.

Bes Pelargic

• The inner parts of the Snail in Bes Pelargic.
• Wu Ping Liu's Advertising Agency in Bes Pelargic.
• The Agatean family estates. The restriction only applies to entering the estate, not to leaving. You can fly and portal out.

Special

• The room inside the vaults where you can put/take stuff.
• The T-shop, but you can portal out.
• The Isle of Tonahamen and a very large part of the surrounding ocean. The T-shop stops here occasionally.
• The Endless Halls maze.
• A crystal sphere.
• The insides of carriages, but you can portal out.
• Inside a witch's circle.
• Any guild advancement rooms. (Other guild rooms? This should be tested to be more precise.)