Afon Collen (Unclassified).
Grid Reference: SH 86170 67717. Parish: Llangernyw, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Afon Collen (Unclassified).
Grid Reference: SH 84406 67244. Parish: Llangernyw, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryncollen (Unclassified).
Grid Reference: SS 77780 99255. Parish: Tonna, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bryn-Collen (Settlement).
Grid Reference: SJ 21442 41279. Parish: Llangollen Urban, Denbighshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cae bry Collen (Field).
Grid Reference: SN 65909 03282. Parish: Mawr, Glamorgan
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae llwyn collen (Field).
Grid Reference: SN 93343 25535. Parish: Senni, Brecknockshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

CASTELL COLLEN ROMAN STATION (Unclassified).
Grid Reference: SO 05573 62868. Parish: Llanfihangel-helygen, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Castle Collen (Unclassified).
Grid Reference: SO 05531 63034. Parish: Llanfihangel-helygen, Radnorshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Collen Cae (Field).
Grid Reference: SO 45751 05081. Parish: Raglan, Monmouthshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Collena (Unclassified).
Grid Reference: ST 01290 88735. Parish: Llantrisant, Glamorgan
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website