Madrid Self-Guided Walking City Tour & Scavenger Hunt

Madrid's grandest mile runs from a palace that's actually a post office to a glass palace that was built for plants — and this trail connects them one riddle at a time. This app-led scavenger hunt takes you through Madrid on foot, using phone-based riddles to guide you from one landmark to the next. No guide, no fixed start time. • Size up the Palacio de Cibeles, the cathedral-like former post office on Madrid's most famous plaza • Wander into the Parque del Retiro, the city's great green escape • Find the Palacio de Cristal, a Victorian greenhouse turned art space by the lake Around 2 hours, any group size, available in Spanish, English, French, and German. By the finish, the showpiece side of Madrid will feel less like a postcard and more like a place you've figured out.