Betchworth Castle is a mostly crumbled ruin of a fortified medieval stone house with some tall, two-storey corners strengthened in the 18th century, in the parish of Brockham. It is built on a sandstone spur overlooking the western bank of the River Mole. The ruin is a Scheduled Ancient Monument and is surrounded by “Betchworth Park” Golf Course.

Legend has it that the castle is haunted by a black dog that prowls the ruins at night, and the Lord of the Manor who allegedly chased and killed an escaping convict with his sword. He later found out that it was in fact his own son he had killed and is said to now walk around the ruins in regret!