We were given a room on the first floor. When we opened the door, we detected a musty kind of odor. Upon opening the bathroom door, the odor increased. It was coming from a drain in the floor. We covered the drain by taping down paper towels over it, closed the drains in the shower and wash basin and opened the window. Luckily, the smell diminished so that we did not have to change rooms. Upon some research on Google, found out that the canal itself added to the odor. We’re thinking the upper floors are not affected.