Caslte on a snail?
In 2016 Eurobricks Brickworld Chicago, I found the theme for collaborative layout was particularly interesting. The concept is to have a snail race with castles on top fighting each other. Well, it is also notable that a familiar name, Cecile Fritzvold, is part of the contributor to this special event.
The snail was designed by Mark Larson, and the participants were to build their own Castle on top of it.