That makes the area underneath them difficult to inspect.

You might be able to look underneath one side, but furniture, bed frames, shadows, luggage, and low clearance can make it surprisingly hard to see the entire space.

A clear plastic water bottle can act as a simple visual tool.

Roll it underneath the bed and watch what happens.

If it travels across the open space and emerges on the other side, you have learned something useful: at least part of the area is unobstructed.

If it stops unexpectedly, you now have a reason to investigate further.

2. The Trick Can Help Check for Objects Under the Bed

There is a much more ordinary reason to do this.

Hotel rooms are used by hundreds or even thousands of guests over time.

People lose things.

Phones, chargers, clothing, toys, jewelry, medication, luggage accessories, and other belongings can end up underneath beds.

Housekeeping may clean the visible parts of a room thoroughly while certain hard-to-reach areas are more difficult to inspect.