Regional File · Wales · County
In May 1909, before aeroplanes were common over Wales, something was reported on Caerphilly Mountain.
Caerphilly’s story opens in the phantom-airship spring of 1909, with a report on the mountain that towers over the castle, and then runs through the area’s later clusters around Blackwood and the Sirhowy valley.
In May 1909, according to the period account, a man walking over Caerphilly Mountain reported meeting a “cigar-shaped” object on the ground, and two figures nearby. The story circulated as part of the wider British phantom-airship wave of 1909 — a spring of airship sightings reported before heavier-than-air flight was a familiar sight over Wales.
Set in that context, Caerphilly’s mountain report reads less like a lone anomaly and more like one of several Welsh notes in a national airship scare — preserved, but hard to pin to a single craft.
Decades later the area produced a busy run of its own, concentrated around Blackwood and the Sirhowy valley in the 1970s and 1980s — domed discs, a “green thing in a red ball”, cigar-shaped objects, and a 1978 Blackwood report of a silvery disc with a porthole.
Thirty-four geographically validated reports span 1909 to 2021. The count excludes out-of-area settlements that a substring match can wrongly pull in — Pontypool belongs to Torfaen, and no Rhondda report is counted here.
The complete record of 34 geographically validated reports follows in the next section.
34 reports, geographically validated as belonging to Caerphilly. These are the individual reports behind that total — not a selection.
34 geographically validated reports, grouped by decade. Summaries are drawn from the SUFON Wales case record and kept brief. Where an exact case page was not found, the entry links to the source archive. Cross-border, out-of-area and ambiguous records are excluded from this count.