The shield walls held firm against the battering rams, buying the city time to organize a counterattack.

Tourists flocked to walk along the ancient city walls at sunset.

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

In the idealized model, the adiabatic walls prevent any heat exchange with the surroundings.

During the mine inspection, we noted cracks forming along the hanging walls near the ore vein.

Trombe walls helped reduce the building's heating costs during the cold season.

During the renovation, workers stripped the paint from the side walls and uncovered the original brickwork.

The architect specified new curtain walls to improve the building's energy efficiency and aesthetic appeal.

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

Many homeowners are buying power walls to store solar energy for use at night.