Looks like we have a garage floor. They also put the dirt back in after they coated the basement walls with the moisture sealant.
The big metal thing is the bracing for our basement daylight window. My escape hatch in case things go really bad.
The biggest drawback your basement has with a daylight window is that zombies can get in - only one at a time, though, so it's managable. Plus the window is small enough to secure, or you can just secure the top of the bracing.