“If you need to know something, why not just ask around? These days, just talking to each other might be the most disruptive solution of all.”
Portugal is an excellent country for that, and people in Lisbon are very approachable: taxi drivers turn out to be genuine city guides, shop keepers leave their shop to show you the right way, bartenders tend to explain you the current national politics or latest developments in football, street vendors enjoy to talk about their country, and just every ordinary Lisboeta happens to be a disguised history professor. Forget about Google, apps and maps. Ask the locals!