What is done, we must undo!" cried Tom, opening the door to the secret passageway that led to his time machine.

We discovered a secret passageway.

There is a secret passageway in my mind leading to my childhood.

We discovered a secret passageway leading to the catacombs.

He left through a secret passageway.

They fled through a secret passageway.

Watch your step, as the passageway is slippery.

This castle is full of secret passageways.