Arden Castle (ardencastle.com) is a home for personal email. It was inspired by the fictional castle in the children's book The House of Arden by Edith Nesbit.

There is actually a village called Arden on the shore of Loch Lomond in Scotland. An old baronial castle nearby, called Auchendennan House, is sometimes referred to as Arden castle. Not far away, Lomond Castle has been converted to holiday apartments.

The photo at the top of the page is by Valerio Bruscianelli (Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=20160232). It shows Neuschwanstein Castle in Bavaria, Germany.