Pisa

Here's an ideal itinerary for 4 days in Pisa for a couple:

Day 1:

• Start your day by visiting the iconic Leaning Tower of Pisa. You can climb up to the top and enjoy the stunning views of the city from above.
• After that, head over to the Piazza dei Miracoli, which is home to several other beautiful landmarks such as the Cathedral of Santa Maria Assunta and the Baptistery of St. John.
• In the afternoon, take a stroll along the Arno River and explore the charming streets of the historic center. You can stop by the Palazzo Blu, a beautiful art museum that often hosts interesting exhibitions.

Day 2:

• Spend the morning exploring the beautiful countryside around Pisa. You can rent a bike or a car and visit some of the nearby towns such as Lucca or San Miniato.
• In the afternoon, head back to Pisa and visit the Museo Nazionale di San Matteo, which houses an impressive collection of medieval and Renaissance art.
• In the evening, enjoy a romantic dinner at one of the many restaurants in the city center. Be sure to try some of the local specialties such as spaghetti alle vongole (spaghetti with clams) or bistecca alla fiorentina (Florentine-style steak).

Day 3:

• Start your day by visiting the beautiful Botanical Gardens of Pisa, which are located near the University of Pisa. The gardens are home to a wide variety of plants and trees from all over the world.
• After that, head over to the Palazzo della Carovana, which is part of the Scuola Normale Superiore di Pisa. The building is a masterpiece of Renaissance architecture and houses several interesting museums and galleries.
• In the afternoon, take a walk along the Lungarno Mediceo and enjoy the beautiful views of the river and the city.

Day 4:

• Spend your last day in Pisa exploring some of the lesser-known attractions. You can visit the Museo delle Sinopie, which houses a collection of sketches and drawings used in the creation of the frescoes in the Cathedral of Santa Maria Assunta.
• After that, head over to the Cittadella Vecchia, an ancient fortress that dates back to the 12th century. The fortress offers stunning views of the city and the surrounding countryside.
• In the evening, enjoy a glass of wine at one of the many wine bars in the city center. Pisa is known for its excellent wines, so be sure to try some of the local varieties such as Chianti or Vernaccia di San Gimignano.

I hope this itinerary helps you plan your trip to Pisa! Let me know if you have any other questions or need more recommendations.