The Goldstone is a large sarsen stone — a type of sandstone boulder that occurs naturally across southern England but is not native to Sussex — that has stood in Hove since before recorded history. It weighs around 20 tonnes and was probably moved here during the prehistoric period, possibly as a waymarker or ritual object. Similar stones were used to build Stonehenge.
The stone now sits in Hove Park, slightly incongruously next to a formal park layout with flowerbeds and a paddling pool. Sarsens are rare in Sussex; how this one got here and what it was used for is genuinely unknown. It's a quiet, odd object worth five minutes of attention if you are in the area.