There is one place named Porton Down in United Kingdom.
All places in the world called "Porton Down".
Weston (16)
Sutton (16)
Middleton (14)
Preston (14)
Norton (13)
Newton (13)
Upton (12)
Kingston (12)
Broughton (11)
Walton (10)
Leigh (10)
Whitchurch (10)
Burton (9)
Thornton (9)
Milton (9)
Barton (9)
Wootton (8)
Carlton (8)
Clifton (8)
Brampton (8)
Denton (8)
Holme (7)
Horton (7)
Linton (7)
Newport (7)
Milltown (7)
Bradley (7)
Stanton (6)
Marton (6)
Castleton (6)