|Bosporthennis shown within Cornwall|
|OS grid reference|
|Sovereign state||United Kingdom|
|Police||Devon and Cornwall|
|EU Parliament||South West England|
There is a scattered settlement of at least three courtyard houses dating from the Late Iron Age at the eastern foot of Hannibal's Carn. The best preserved has walls up to 1.5 metres high, with an adjoining paddock. Another has a late medieval cowhouse built inside its walls. Within the settlement there is a feature called the Bosporthennis Beehive Hut (grid reference ), which has been identified as an above ground fogou, similar to the round, subterranean chamber at Carn Euny. This identification is considered doubtful, Clark discussed the structure and concluded that it does not possess enough of the usual features of a fogou for it to be regarded as such. The Bosporthennis chamber, made of corbelled stone, is 4 meters across and is connected to a smaller oblong chamber, originally the entrance, 3.3 meters by 2.1 meters, both are now roofless.
Bosporthennis Quoit (grid reference ) is a portal dolmen laying within a mound 6 metres across and 0.8 metres high. Three of the original four upright stones survive, of which one is 1.5 meters high, and the chamber is 1.5 by 1.3 meters. The capstone currently has a diameter of 1.6 meters, and is very round as it had been trimmed for use as a millstone. When excavated in 1872 sherds of pottery were found alongside calcined bones.
- Ordnance Survey: Landranger map sheet 203 Land's End ISBN 978-0-319-23148-7
- E Clark (1961). Cornish Fogous. Taylor & Francis. pp. 109–116.
- MONUMENT NO. 423621 Archived November 10, 2013, at the Wayback Machine., Pastscape, retrieved 11 November 2013
- Craig Weatherhill Cornovia: Ancient Sites of Cornwall & Scilly, Halsgrove, 2009
Media related to Bosporthennis at Wikimedia Commons