The crew was walling up the old mine entrance when they discovered a disturbing message scratched into the stone.

The engineer inspected the toe walls after the heavy rain to ensure they hadn't shifted.

Many modern offices install living walls to improve air quality and employee well-being.

The law firm established ethical walls between its corporate and litigation teams to prevent conflicts of interest.

The law firm maintained strict Chinese walls between the audit and advisory teams to prevent conflicts of interest.

The team went balls to the walls to meet the impossible deadline.

They went balls-to-the-walls in the final minutes of the game to mount a comeback.

Many websites use login walls to restrict access to premium articles, frustrating casual readers.

Under the microscope, the plant's cell-walls appeared thick and clearly defined, protecting each cell.

The Berlin Walls that once divided the city are now covered in vibrant murals.