This building is surrounded by firewalls.

I thought his plan was perfect, but in fact there were some flaws.

He said there's no such thing as a perfect human.

This retaining wall is designed to withstand earthquakes.

His favorite vase is placed in this niche.

The walls of this room are painted white.

The history of the Berlin Wall is very interesting.

He likes climbing rock faces.

He suddenly did a 'kabe-don' and surprised me.

He hung a picture on the northern wall.