The door marked "VHELEX".

Cersi opens the groaning and ancient door and steps into...

A meadow? Green grass covers the floor of the room, and a hill gently rises in the center of the room. On top of the hill is a bush, containing a single beautiful crimson flower. The flower seems to be watching her, but that cannot be true. The sweet scent of the flower fills the room, but nothing else is present.

On the far side of the lush green hill is a door marked "IBROXIS".