Caerau

This bivallate Iron Age hillfort has a ruined church inside, built in the late 1200s (though perhaps there was one there even earlier). There was said to have been a 2000 year old yew tree, but this was burnt down in the 1930s. Isn’t that the kind of age people always say about yew trees? but it would be interesting if true. The church has been vandalised in the past but some people set up a group to protect the building and the fort, when they were threatened with housing development in the mid 1990s. Their website is here:
stmaryscaerau.org/