The Cathedral of the Holy Cross and Santa Eulàlia, or simply the Barcelona Cathedral, is the Gothic cathedral and seat of the Archbishop of Barcelona. Its construction began in 1298 on the site of an ancient Roman temple and took more than 150 years to be completed. Located in the centre of the historic Gothic Quarter of Barcelona, the cathedral is dedicated to the martyr Santa Eulàlia – the patron saint of Barcelona – who was tortured to death in late Roman times. Her corpse is buried under the main altar. Be sure to climb to the roof for a nice view of the city, and don't forget to visit the serene and beautiful courtyard, which is occupied by thirteen white geese representing the years of Saint Eulalia's life before she was martyred.

Several religious buildings surrounded by a wall make up the monastery, set amid a park on the Moskva River bank. To grasp the importance of the place throughout the course of Russian history, visit the Novodevichy Cemetry, where many prominent Russians found their final resting place, from literary behemoths (Chekhov and Gogol) to politicians (Boris Yeltsin). The monastery has remained near-intact since the 17th century.

Arco De Las Pesas (literally Gate of the Weights) is located just off Plaza Larga, a striking Islamic gateway defensive wall. The archway is built with stone from the city of Malahá and was built in the eleventh century.