Photo credits

• lisbon: photo by Dale Cruse - 10M views from San Francisco, CA, USA, licensed CC BY 4.0, via Wikimedia Commons. Cropped.
• tram: photo by Paul Arps from The Netherlands, licensed CC BY 2.0, via Wikimedia Commons. Cropped.
• belem: photo by Berthold Werner, licensed CC BY-SA 4.0, via Wikimedia Commons. Cropped.
• nata: photo by Mike Finn from Worcester, United Kingdom, licensed CC BY 2.0, via Wikimedia Commons. Cropped.
• sintra: photo by Jakub Hałun, licensed CC BY 4.0, via Wikimedia Commons. Cropped.
• porto: photo by Jakub Hałun, licensed CC BY 4.0, via Wikimedia Commons. Cropped.