Paul Farquhar
Legend
Some dungeons do not give you the freedom to simply leave. The Hidden Shine of Tamoachan, not only prevents you going back out the way you came in, it forces you to keep moving forwards.That's just plain false. If I remove your choice and you can't see it, you are still on those rails. It's just a smooth ride.
That's absurd. You can't turn yourself into nuclear bomb, either. Choice isn't about simple compass directions.
The dungeon doesn't prevent you from going anywhere in the world you could have gone prior to going into the dungeon. You just walk out and go. Before I went into the dungeon I could go anywhere I wanted in the world, including the dungeon. After I enter the dungeon I can go anywhere in the world I want, including the exit. No choice has been removed from my PC.
Does that make Hidden Shrine a railroad? I prefer not to deal in absolutes (leave that to the Sith). It's certainly more railroady than the an average dungeon, which is, in turn, more railroady than the average wilderness.
But the worst railroading I have seen is (unsurprisingly) in a computer game - BG2 Throne of Bhaal to be precise. I spotted immediately that a certain character was the villain, but was prevented from striking her down with my sword by the game engine itself, which kept me locked in "dialogue mode" then trotted me out the building.