Rotundaland

Rotunda Land is a large kingdom ruled by Queen Rotunda, it appeared in The Super Mario Bros. Super Show! episode "Love 'Em and Leave 'Em / Will the Real Elvis Please Shut Up!".

Little is actually shown of Rotunda Land, though it appears to have a large amount of hills and mountains in it. The, oddly bulging, castle of Queen Rotunda is located on one of these mountains.