Will have a 10 hour layover at bwi. Where to kill time?

No where ! Just please sit and wait for the flight!

There are some lounges

There are hotels ive never heard of a 10 jour over lay therr restaurant and all if u havnt been on the flying dog brewery restaurant maby u should stop in and see

If you want to leave the airport, I suggest Arundel Mills mall. Lots to do in that area and just down the street of rental facility.