List of famous buildings in the Octagon Mode movement, listed alphabetically with photos when available. This list of Octagon Mode buildings, structures and monuments includes information like what city the structure is in, and when it was first opened to the public. There are a lot of historic Octagon Mode structures around the world, so why not save some money and check them out here without having to pay for travel? These popular Octagon Mode buildings attract visitors from all over the world, so if you're ever near them you should definitely pay them a visit. List items range from Dubois-Sarles Octagon to Andover Public Library Central Library.This list is a great source for answering the questions, "What are the most famous Octagon Mode buildings?" and "What do Octagon Mode buildings look like?"