{"geometry":{"type":"MultiPolygon","coordinates":[[[[-2.308668,53.61245],[-2.308532,53.612467],[-2.308368,53.612481],[-2.308222,53.6125],[-2.308087,53.612527],[-2.30795,53.612563],[-2.307819,53.612609],[-2.30761,53.612696],[-2.307497,53.612745],[-2.30791,53.613839],[-2.308259,53.613714],[-2.308454,53.613638],[-2.308708,53.613548],[-2.309199,53.613319],[-2.309221,53.613305],[-2.309241,53.613289],[-2.309257,53.613273],[-2.309276,53.613246],[-2.309305,53.613192],[-2.309314,53.613079],[-2.309309,53.612965],[-2.309299,53.612859],[-2.309271,53.612778],[-2.309238,53.612695],[-2.309192,53.612614],[-2.309096,53.612527],[-2.308968,53.612476],[-2.308827,53.612444],[-2.308668,53.61245]]]]},"type":"Feature","properties":{"entry-date":"2026-08-28","start-date":"1996-07-24","end-date":"","entity":13913187,"name":"Promontory fort called Castlesteads on the east bank of the Irwell 550m SSE of Banks Farm","dataset":"scheduled-monument","typology":"geography","reference":"1014720","prefix":"scheduled-monument","organisation-entity":16,"quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1014720"}}