Let's say the BBEG has their Tower of Doom protected by a Forbiddance spell and rather than kick down the front door, the party wants to sneak in all ninja-like. To do this, they want to use a spell to get inside quietly.
The relevant wording in the Forbiddance spell description says:
You create a ward against magical travel...For the duration, creatures can't teleport into the area or use portals...to enter the area.
I'm assuming Dimension Door wouldn't work as the description starts off with
You teleport yourself...
But, what about Passwall?
A passage appears at a point of your choice that you can see on a...surface within range...
Does the magical travel wording of the Forbiddance spell prevent Passwall from working, or can Passwall be used to enter an area protected by Forbiddance?