Includes the 360 Observatory at the top of Place Ville-Marie! 100% indoors = perfect for a cold winter or hot summer day. If you're ready for a fascinating adventure, put on your walking shoes, bring your curiosity and let's go! Montreal is home to the world's most extensive underground pedestrian network! It is known as the underground city, the RESO or "la ville souterraine" in French. With its start in the early 1960's, the network today has blossomed into 33 km (21 mi) of tunnels and passageways that connect office towers, shopping centers, performing arts venues, hotels, university pavilions, department stores, exhibition halls and our metro system (subway). This is a fun and in-depth experience where you will navigate the maze of tunnels, staircases & passageways, learn about the history and functions of the network and admire creative artwork, interesting spaces and architecture along the way. The tour finishes with one of the most stunning panoramic views of Montreal!