If you walk into a certain building, however, and knock on a particular door, things will change in an instant.

"We know where there are damaged walls within certain buildings," he said.

The dank ground was dark, despite the night activity in certain buildings.

In some places, it is illegal to take pictures of certain buildings.

The term is also used to describe certain buildings and their functions.

The park's interpretive signs point out where certain buildings used to stand.

Players gain more followers as they level up or from building certain buildings.

It is also illegal to take pictures of certain buildings.

Higher levels of security than this are then placed around certain buildings.

The horse hadn't far to go before it reached a certain building.