1. Almudena Cathedral
Overview: Madrid’s only cathedral joining different styles, such as Neoclassic, Neogothic, Neoromanesque. It was consecrated by the Pope John Paul II, during his fourth visit to Spain, the 15th June 1993 (so is fairly ‘modern’)
Time required: 20 mins — 1 hour depending on how long you’d like to sit and soak it in
Tips: Go for a walk to the end of the plaza (Mirador de la Cornisa del Palacio Real) for a lovely lookout