marcoasalazarm
Explorer
Depends on the specific location. Example: The Pokemon island chain/pocket dimension is smack in the middle of the way between Japan and Hawaii, so any transportation that goes between those two points will need to go around a bubble of about 200 nautical miles otherwise they will need to deal with an additional three or four days' trip as they go through.
For the time being, let's say the island chain's bubble is in that spot marked "43 Million Years".
In the case of Hyrule, it's not visible until you enter it, and it "expands" the area of the Pennsylvania Wilds (or the Allegheny National Forest, haven't completely decided yet) by a few hundred miles. The bubble that encases it would probably reach 5 to seven thousand feet high (still thinking that part over)? Dimensional portals probably open to specific locations within Hyrule, like a portal that is meant to go to the Water Plane drops you in the entrance of the Water Temple.

For the time being, let's say the island chain's bubble is in that spot marked "43 Million Years".
In the case of Hyrule, it's not visible until you enter it, and it "expands" the area of the Pennsylvania Wilds (or the Allegheny National Forest, haven't completely decided yet) by a few hundred miles. The bubble that encases it would probably reach 5 to seven thousand feet high (still thinking that part over)? Dimensional portals probably open to specific locations within Hyrule, like a portal that is meant to go to the Water Plane drops you in the entrance of the Water Temple.