Itinerary for 3 day trip to Europe

Here's an ideal itinerary for 3 days in Europe that meets all your constraints:

Day 1: Barcelona, Spain

Start your day with a visit to the famous , a stunning basilica designed by Antoni Gaudi.
Next, head to , one of the most popular beaches in Barcelona. Here, you can soak up the sun, swim in the Mediterranean Sea, and even try your hand at surfing.
For lunch, grab some tapas at one of the many beachside restaurants.
In the afternoon, take a stroll down , a bustling pedestrian street filled with shops, street performers, and cafes.
End your day with a visit to , another one of Gaudi's masterpieces. The park offers stunning views of the city and is a great place to watch the sunset.

Day 2: Nice, France

Start your day with a visit to the , a beautiful seaside promenade that stretches along the coast of Nice.
Next, head to , a popular beach in Nice. Here, you can relax on the sand, swim in the turquoise waters, and even try your hand at surfing.
For lunch, grab some fresh seafood at one of the many beachside restaurants.
In the afternoon, take a stroll through the charming , with its narrow streets, colorful buildings, and bustling markets.
End your day with a visit to , a hilltop park that offers stunning views of the city and the sea.

Day 3: Lisbon, Portugal

Start your day with a visit to , a historic tower that dates back to the 16th century.
Next, head to , a popular beach just outside of Lisbon. Here, you can soak up the sun, swim in the Atlantic Ocean, and even try your hand at surfing.
For lunch, grab some traditional Portuguese dishes at one of the many beachside restaurants.
In the afternoon, take a stroll through the charming , with its narrow streets, colorful buildings, and stunning views of the city.
End your day with a visit to the , a historic castle that offers panoramic views of Lisbon and the Tagus River.

I hope this itinerary helps you plan your trip to Europe! Let me know if you have any other questions or if there's anything else I can help you with.