Population: Over 1.6 million (2012)
Source: National Institute of Statistics This temperate Spanish city draws art and food lovers alike, who come to explore the Picasso museum, walk the winding alleyways of the Gothic Quarter, and indulge in fresh seafood and sangrias at local tapas bars. A visit isn't complete without experiencing Antoni Gaudí's iconic Sagrada Familia Basilica and whimsical Park Güell. Rick Steves’ Audio Europe (Free) When you arrive in Barcelona, you can count on European travel expert Rick Steves to show you around. His Barcelona guide offers a walking tour of the city's great artists, from Picasso to Gaudí to Dali. Download Steves' radio shows to learn to “Live Like a Spaniard” or to understand the region's delicacies (yes, bull's tail is a thing).
Hailo (Free) While the Old City's narrow lanes are perfect for traveling on foot, you'll want a cab to reach other destinations, such as the gardens of Park Güell. Dubbed the Uber of Europe, this popular ride-hailing app is up for the task. You can choose the type of car you want, set pickup locations, get fare estimates, and pay all within the app.
Spotted by Locals (Free) Spotted by Locals shows you the coolest places to eat, drink, party, and experience local culture. Once you pay $3.99 to download the Barcelona map, you'll have access to tons of reviews from locals, from the best sandwich joints to the latest play at the local opera house. You can mark favorites, switch to a map view, and navigate offline via GPS.
Barcelona Travel Guide (Free) This app's photo tour of Barcelona is a great tool for planning your trip, offering visuals and reviews of the city's top attractions. You can save places you'd like to visit to Favorites, and even connect to booking services for hotels, tours, and event tickets. The app is free, but there's a catch—it is ad-supported.