here is what I think the worlds of wizard101 came from
Wizard City based on 19th-20th century England: why: cobblestone roads, British accents, carnival areas, castles schools: all
Krockotopia based on ancient Egypt and the discovery of the tombs: sphinx, pyramids, excavation sites, crocodiles are found in Egypt schools: includes the three main balance powers
Marleybone based on London at the time of Sherlock Holmes: dr. von catstien was based on dr. von Frankenstein all things in this world were based on London at the time schools constant use of electrical power
Mooshu based on ancient china : residents there were raised by ancient Chinese, ninjas, samurai(samoori in the game) bamboo, clothes, onis are ancient Chinese myth, elephants schools:many life enemies including jade oni
Dragonspyre based on the aftermath of Pompeii, plus simply fictional whims: large volcano, everyone is a ghost, everything is demolished schools: malistare's home, plus all the dragons, dragonspyre academy only has two school trees, fire and death
Grizzlehiem based on ancient Vikings and Norway: much Norse mythology is used here, plus all residents are animals that live there commonly schools home of the ice titan hammer forge, many cold places many lush places
Wintertusk based on much of the artic circle, and very north areas: everything is frozen, many polar bears live here: plot literally includes stopping everything from freezing schools: home of the frost giant listed above things
Wistyria based on Mexico: houses are Mexican style, many plants, like in Mexico, grow here, there is a plant called wisteria that grows in Mexico, pigs are found in Mexico schools : everything is being overthrown by plants
Celesta this one was hard, most of it is based on Atlantis I believe, but the floating land was either Hawaii or Australia : your underwater, a water mole is a platypus, much coral like in coral reef, aliens are fabled to have created Atlantis, aliens are common here schools, : underwater, birthplace of astral magic
Zafaria based on ancient Africa: African animals, zafaria sounds like safari, African themed everything schools: ? I really don't know I have never been to this world much
Avalon based on ancient Europe during the time of King Arthur the Great : knights, European mythology is almost overused, animals here were found in Europe at that time, I is almost directly following the myths of King Arthur schools mostly myth: so many myths are used, storm people are invading
Azteca
Based on ancient American north and south an central mythology, and in the time of the supercontinent Pangaea, or the time of the dinosaurs: mythological central American gods, dinosaurs meteor that killed the dinosaurs is a place you visit schools ? I have never been here
Krysalis based on your backyard: insects and mice schools shadow? never been here
Aquila based on ancient Greek and roman myths: gods of Greeks and romans, myth of the odyssey schools
includes the three main balance powers 
many life enemies including jade oni
malistare's home, plus all the dragons, dragonspyre academy only has two school trees, fire and death
