The Fantasy Castle is a members-only land den that was released during 2012. It was formerly sold at the Den Shop until it was removed sometime during 2017. It returned in June 2018. On August 1, 2018, it became a promo gift received in the World of Fantasy Bundle, available when purchasing a membership in the month of August.
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.