The Fantasy Castle is a members-only land den that was released during 2012 and could be purchased from the Den Shop.
The Fantasy Castle is a fancy castle overhanging a cliff and includes four rooms, two outdoor spaces and a waterfall. Jammers can swim through part of the waterfall next to a small bridge. The background of the den reveals a small river running along rolling hills that lead to sharp mountain peaks with a rainbow and puffy clouds in the sky.
- It is the fourth biggest den, the third being the Crystal Palace, the second being the Greely's Hideout and the first being Sky Kingdom.
- This den is very spacious and wide compared to the Small House Den.
- This den was formerly used as "AJHQ's Den," which could have been found on the Epic Dens' tab. It was later replaced with the Jamaaliday House.