That should be at the lowest part of the basement floor.

The building contains one basement floor, with 400 units inside.

The basement floors are open 24 hours a day, seven days a week.

At first you can't see the basement floor because of all the rocks.

You might even find them in the middle of the basement floor.

In a basement floor there is a sports hall and a kitchen.

Where the building once stood is now only a basement floor.

The main building is four floors high with one basement floor.

When we got to the basement floor, she finally spoke.

At the bottom of the pit was the original basement floor.