This document describes NIFLAR's 3D virtual worlds created for language learning. It discusses NIFLAR environments created in Second Life and OpenSimulator, including regions modeled after real-world locations like a Spanish city and Asterix village. These virtual worlds are designed to provide culturally authentic settings and opportunities for social interaction to develop intercultural communication skills. The document outlines several activities and tasks used in the virtual environments, such as treasure hunts, guided tours, problem-solving games, and communicative games.