Princess Peach's Castle/Basement Gallery

The Basement Gallery is an area in Peach’s Castle that appears to be a room full of paintings.

The only found footage of this tape was uploaded by a Youtuber named Dawdu.

The Tape
In the tape, we can see Mario entering inside an empty room. There are two doors, one going straight and one going upstairs. They are both divided by a wall. The player enters the door heading straight.

Inside is a hallway that has another door which leads to another room. The player enters this room.

The room is filled with paintings, and a pipe in the middle of the room. There is a sign that reads,

”Ciao! You have entered Princess Toadstool’s Basement Gallery! Please take a second to view the beautiful paintings hand-crafted by the wonderful artists of The Mushroom Kingdom

But fair warning, do not enter the pipe in front of you! Who knows what danger dwells down there.”

The player, after exploring the room for a bit, enters the pipe, and the tape cuts off.

https://www.youtube.com/watch?v=P5cl46ZN8b8