Madrid, Spain Top 12 + Bonus: Smart City Guide from Gran Vía to Retiro Cuatro Torres Business Area Gran Vía Madrid travel guide Madrid walking tour Metro de Madrid tips Plaza Mayor Prado Museum Puerta del Sol Retiro Park Royal Palace Madrid +
London Tube Guide: Oyster Cards, Zones, & More 4K bestravelvideo DiscoverLondon England ExploreLondon LondonMetro LondonTourism LondonUnderground OysterCard travel TravelLondon VisitLondon +