Barcelona is Gaudí architecture, beaches, and Mediterranean energy. The Sagrada Família (Gaudí's unfinished basilica) is stunning and surreal. It's been under construction since 1882 and still isn't finished. Book tickets months in advance. Park Güell (another Gaudí creation) has colorful mosaics and views over the city. La Rambla is the famous pedestrian street packed with tourists, street performers, and pickpockets (watch your stuff). The Gothic Quarter has narrow medieval streets and a more local vibe. Barceloneta is the beach neighborhood. The beach isn't the best in Spain, but it's there. Barcelona is lively, touristy, and one of the most visited cities in Europe.

Madrid is museums, parks, and nightlife. The Prado Museum has one of the best art collections in the world (Velázquez, Goya, El Greco). The Reina Sofía has modern art (including Picasso's Guernica). Retiro Park is massive and perfect for a lazy afternoon. Plaza Mayor and Puerta del Sol are the main squares (touristy but lively). Madrid doesn't have the beaches or Gaudí architecture of Barcelona, but it has energy, culture, and some of the best nightlife in Europe. Dinner starts at 9-10pm, and people don't go out until midnight.

Seville in the south is flamenco, Moorish architecture, and heat. The Alcázar (a Moorish palace) is stunning. Game of Thrones filmed here. The Seville Cathedral is massive (the largest Gothic cathedral in the world), and you can climb the Giralda tower for views over the city. Flamenco shows happen nightly in small venues. Seville is hot in summer (40°C+/104°F+), so go in spring or fall.

Granada has the Alhambra, a Moorish palace and fortress on a hill overlooking the city. It's one of the most beautiful and most visited sites in Spain. Book tickets months in advance or you won't get in. Granada is smaller and less touristy than Seville.

The Basque Country in the north (San Sebastián, Bilbao) is green, rainy, and culturally distinct. San Sebastián has one of the best food scenes in Europe (pintxos, the Basque version of tapas). Bilbao has the Guggenheim Museum (a modern art museum in a stunning Frank Gehry building). The Basque Country feels different from the rest of Spain. The people are proud of their culture, language, and food.

Galicia in the northwest (Santiago de Compostela) is green, rainy, and the end of the Camino de Santiago (a famous pilgrimage route). It's less touristy and more authentic.

The islands (Ibiza, Mallorca, Canary Islands) are beaches, nightlife (in Ibiza), and year-round sunshine (in the Canaries). They're touristy and expensive in summer, but beautiful.

Spanish food is tapas (small plates), paella (rice dish with seafood or meat), jamón (cured ham), chorizo (spicy sausage), and wine. Tapas culture means you eat small plates while standing at a bar and drinking wine or beer. It's social, casual, and delicious. Spanish food is simple, fresh, and regional. Every region has its own specialties.

Spanish people are warm, loud, and social. Dinner is late (9-10pm). Siesta (afternoon nap/rest) is real, especially in the south. Shops close from 2-5pm. Nightlife starts late (midnight or later). Spaniards are proud of their culture, their food, and their lifestyle. They'll tell you life is better here, and honestly, they might be right.

Getting around is easy. High-speed trains (AVE) connect Madrid, Barcelona, Seville, and other major cities in a few hours. Regional trains and buses go everywhere else. If you want to explore the countryside or coastal towns, rent a car.

Spain is affordable compared to northern Europe. Hostels run $15-30/night. A meal at a restaurant is $10-15. Tapas are $3-5 each. Wine is cheap. Barcelona and Madrid are more expensive than the rest of Spain, but still reasonable.

When to go: Spring (April-May) and fall (September-October) are perfect. The weather is warm, crowds are manageable, and prices are reasonable. Summer (June-August) is hot (especially in the south) and crowded. Winter (November-March) is mild in the south, cold in the north. Cities like Madrid and Barcelona are lively year-round.

Spain is diverse, beautiful, and full of life. You could spend months here and not see it all. So don't try to in a single trip.