Two or three days is the right amount of time for Valencia, and four is relaxed if you want the lagoon or the Roman ruins as well. A travel guide Valencia visitors trust would put it this way: keep the two cores on separate days, put the evenings where the food is, and the trip organizes itself.
Day 1: Market, Cathedral, Carmen
Breakfast at Mercado Central, then the cathedral and the climb up El Miguelete, then the afternoon in Barrio del Carmen and the old gates. Dinner in Ruzafa. No transport needed all day.

Day 2: The Science Complex and the Beach
Walk or cycle the Turia Gardens to the City of Arts and Sciences in the morning, and start with the aquarium if you have children. Afternoon on the sand at Malvarrosa or the promenade at Las Arenas, then paella near the water. If it rains, the science museum absorbs the afternoon and the day still works.
Day 3: The Lagoon or the Ruins
A third day is a choice between two directions. South is Albufera, 10 kilometers out, with the boat, the rice fields and the sunset. North is Sagunto, with the Roman theater and the hilltop castle ruins above the coast. Wine drinkers can head inland to Requena in the Utiel-Requena region, where a bodega visit usually ends with Cava.
Getting Around Without a Car
The airport sits on the metro. As of November 2026, Line 3 runs from Terminal 1 to Xàtiva or Colón in 15 to 20 minutes, every 12 minutes, for €2.25 or €1.80 off-peak, and the gates take contactless cards. A taxi into the center is €20 to €25, and the bus is €4 and slower. Inside the city, Metrovalencia covers the outer neighborhoods and the EMT buses fill the gaps, but most of what you came for is walkable.
The Valencia Tourist Card bundles unlimited public transport with discounts at more than 30 sites, the City of Arts and Sciences included at up to 20 percent off, in 24, 48 and 72-hour versions for €17 to €32. Do the arithmetic against your own list before buying. On a two-day trip spent mostly on foot, it rarely pays.
Two habits are worth knowing before the first bill. Tipping is not mandatory, and rounding up or leaving 5 to 10 percent is what good service gets. Tap water is safe to drink, so ask for it rather than buying bottles all week.
If Valencia is one stop on a longer Spain tour, two nights here fit between Barcelona and Madrid without much strain, and the old city is small enough to see on the way in.