This document lists various augmented reality and projection mapping projects done by museums to bring exhibits and historical content to outdoor spaces without physical walls. It discusses how augmented reality allows for immersive experiences anywhere and provides examples of projects from the Museum of London, Royal Ontario Museum, Stedelijk Museum, and others. It also notes how augmented reality is more than just a technology, but a new model for museums to tell stories in an interactive way using different media and technologies that can be updated over time.