It can be considered the main street of the city of Barcelona, dividing the central district of Eixample in two. It was flooded in 1860 and has a length of 10.2 km.
The Diagonal Avenue starts in the Sant Martí district (near Sant Adrià del Besòs, close to Ronda del Litoral) and diagonally crosses the city for about 12 kilometers, ending its route in Esplugues de Llobregat on Ronda de Dalt.
If you drive through parking lots in Barcelona, it is very likely that you will cross it at some point.
Designed by the engineer Ildefonso Cerdá in its beginnings, it stands as one of the most iconic arteries of the city. As one of the main axes designed for the expansion of the city (l'Eixample), its purpose was to break the rationalist grid conceived by Cerdá, in conjunction with Meridiana Avenue. These two avenues, converging at Plaza de las Glorias Catalanas along with Gran Vía, were laid out with the intention of establishing a new urban center; although Plaza Cataluña eventually took a more prominent central role in the city's layout.
Since it crosses the entire city of Barcelona, it is difficult to define where to park on Diagonal Avenue, as we are talking about the entire city. Remember that the Barcelona City Council regulates street parking, so you should look for the zone you are in before parking: whether it's green, blue, or, if you're lucky, white (free). Remember to check the signage and pay the corresponding fee.
To park on Diagonal Avenue in the center, you should know that it is more difficult to find street parking, and parking lots can be a bit more expensive as it is a very touristy area. Also, be aware that availability is limited, and if you don't plan your visit in advance, you might not find parking lots in Barcelona.
The beginning of Diagonal Avenue is in the Sant Martí neighborhood, where you'll find the Fòrum and Diagonal Mar. It's a very new area with numerous parking lots and street parking areas, as it features wide and residential streets. You can park on the street or in a parking lot and use public transportation to reach the center, as this area is well connected to the center via metro and bus. Additionally, it connects to other areas of Barcelona through the tram, a sustainable and cost-effective transportation method that is expanding throughout the city of Barcelona.
Due to its proximity to the beach, the technological cluster 22@, and being the host of music festivals like Primavera Sound or Cruilla, this area is extremely well-connected and has several parking options.
Towards the end of Diagonal Avenue, you'll find the Hospital de Sant Joan de Déu, the L'illa Diagonal Shopping Center, or the Finestrelles area, right at the end of Barcelona. Keep in mind that shopping centers (Finestrelles or L'Illa) usually have parking where you can park, typically aimed at customers. You can also try parking on the street, especially on the more residential streets bordering Esplugues de Llobregat or Hospitalet, where it's easier due to less congestion.