Do staircases stay in skull cavern?

Chef's answer
The Staircase is a craftable item used to instantly create a ladder that leads down one level in The Mines or Skull Cavern. ... In addition, once a staircase has been placed, it cannot be picked up again, even if it has not been used.
Frequently asked Questions 🎓
The Staircase is a craftable item used to instantly create a ladder that leads down one level in The Mines or Skull Cavern. ... In addition, once a staircase has been placed, it cannot be picked up again, even if it has not been used.
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