The name of our tour was Corner to Corner, and it is spot on. You go from one end of the city to another all in one day. Gives you the opportunity to take trains, buses, escalators, and cable cars. Got a taste for all Comuna 13 has to offer and experience the tranquility of Arvi. The guide, Sebastian was very good, especially with an overly large group (20). This excursion should be no more than 10 people per tour guide, probably better with 6-7.