The fourth walls of the theater were painted a vibrant red.

The fourth-walls in this play are constantly being broken.

The hot walls of the sauna radiated warmth.

The ladder walls were covered in ivy.

The rat walls in the basement were infested with rodents.

The rope walls of the obstacle course were challenging to climb.

The sea walls along the coast protect the city from flooding.

The shear walls in the building provide structural stability.

The thoracic walls protect the organs in the chest.

The tsunami walls along the coast protected the city from the destructive waves.