The hamlet is best known for its central duck pond and Fonmon Castle, a historical house located on the otherside of the B4265 road to the north.

The largest house in the hamlet is called The Gables, accessed off a drive on the left approaching Fonmon from the north.

The present owners, the Boothby baronets, are descendants of Colonel Philip Jones, who bought the house in 1654.

[3] The ceilings and library were designed by Thomas Stocking in the Rococo style and extensive gardens were added.

[3] In 2022, archaeologists have discovered around 70 ancient graves on the grounds of Fonmon Castle, near the runway of Cardiff Airport.