Maarwraawroo was one of the largest cities on the planet Kashyyyk. It had been built around a manufacturing facility located within the intertwined branches of wroshyr trees. It was home to many Wookiees and other species native to Kashyyyk
Behind the scenes
Maarwraawroo was first mentioned in the article Secrets of Kashyyyk in the 2001 magazine Star Wars Gamer 4.
Sources
"Secrets of Kashyyyk" — Star Wars Gamer 4 (First mentioned)- The Complete Star Wars Encyclopedia