Ardgowan Castle - Credit: Wikimedia Commons
Ardgowan Castle, originally called Inverkip Castle, is located in the Private Garden of "Ardgowan House, Castle & Gardens" near Inverkip, Scotland. It is near the Firth of Clyde in Inverclyde, in the former county of Renfrewshire. The three-storey ruin of the 15th century tower house is protected as a category B listed building. Read more on Wikipedia
Source: en.wikipedia.org