Everyone does Barcelona. Almost nobody keeps going, which is a mistake, because the rail line running south along the Spanish Mediterranean is one of the easiest and most rewarding week-and-a-half trips in Europe: Roman ruins over beaches, proper paella in its birthplace, and a coastline that gets cheaper and more Spanish with every stop.
Barcelona without going broke
Barcelona in 2026 is expensive and crowded, so play it smart. Dorms run 30 to 40 euros; book ahead and stay in Gracia or Sant Antoni rather than the Gothic Quarter, where you pay more to sleep above a stag party. Buy Sagrada Familia tickets online at least a week out, around 26 euros. The free wins are the best ones anyway: sunrise at the Bunkers del Carmel lookout with the whole city and sea spread below, the Boqueria market early before the tour groups, and hours of wandering the Born. Three or four nights is enough. Watch your pockets on the metro; it is a cliche because it is true.
Sitges and Tarragona
Rodalies commuter trains leave Barcelona every 20 minutes and reach Sitges in about 40 minutes for under 5 euros. Sitges is a whitewashed beach town with seventeen beaches and a famously open, festive atmosphere; even a half-day swim stop resets you after the big city. Another 40 minutes down the same line, Tarragona is the sleeper hit of this route. This was Tarraco, capital of Roman Spain, and its amphitheatre sits right above the Mediterranean, so gladiators once fought with the same sea view you get eating lunch. A combined ticket to the Roman sites costs about 12 euros, and the medieval upper town is full of terraces where a menu del dia is 14 euros.
Valencia, where the paella is from
From Tarragona, trains reach Valencia in around two hours for 18 to 28 euros. Give Valencia three nights; it might quietly be Spain's most liveable big city. The old riverbed of the Turia was turned into a nine-kilometre park that curls through town, and you can cycle it end to end from the futuristic City of Arts and Sciences to the old quarter. Eat paella at lunch, never dinner, and ideally in El Palmar on the Albufera lagoon where the dish was born; expect 15 to 18 euros a head for the real thing, rice scorched into a crust at the bottom of the pan. The beach at Malvarrosa is a flat sandy kilometre-wide thing you can walk to by tram.
South to Alicante
The final leg to Alicante takes about two hours by train. Alicante gets dismissed as a package-holiday airport town, and the seafront strip earns that, but climb to the Castillo de Santa Barbara on its rock above the harbour and look down the coast, then descend into the Barrio de Santa Cruz, a tangle of steep alleys with pot plants and tiny bars where locals actually outnumber tourists. From here budget airlines fan out across Europe, or you can keep riding rails inland to Madrid in two and a half hours.
Costs and timing
Budget 50 to 60 euros a day in Barcelona and 40 to 50 everywhere else. June and September are perfect: sea warm, cities not yet or no longer at peak crush. August is heaving and hot. Book the two long train legs a week or two ahead on the Renfe site for the cheap fares, and carry swimwear in your daypack always; on this route a beach is never more than twenty minutes away.
