Old Luftwaffe fields in Northern France

Hi All
As usual am after words of wisdom.

Off to Northern France in October with Mrs waco and the outlaws. The main mission will be the Somme.

That said I wondered if there was anything left to see of old Luftwaffe fields in Northern France. Since I assume they were just that, fields, all traces disappeared years ago but I thought I would ask.
Cheers
Waco !