Portovenere is a beautiful coastal town located in the Liguria region of Italy. It is known for its colorful houses, stunning sea views, and historic landmarks. Here are some things to do in Portovenere:

1. Visit the Church of San Pietro: This ancient church is perched on a cliff overlooking the sea, and offers breathtaking views of the coastline.

2. Explore the Doria Castle: This medieval fortress was built in the 12th century and offers panoramic views of Portovenere and the Gulf of Poets.

3. Take a boat tour: You can take a boat tour around the coastline to see the stunning cliffs, caves, and beaches from the sea.

4. Visit the Byron's Grotto: This is a natural sea cave that inspired the famous poet Lord Byron, who swam here during his visit to Portovenere in 1822.

5. Relax on the beach: There are several beaches in Portovenere where you can relax, swim, and soak up the sun.

6. Walk along the promenade: The promenade is a beautiful walkway that runs along the seafront, offering stunning views and a great spot for a leisurely stroll.

7. Visit the Palmaria Island: Take a ferry to this beautiful island, which is part of the UNESCO World Heritage site of the Cinque Terre. Here you can hike, swim, and enjoy the natural beauty.

8. Try the local cuisine: Portovenere is known for its seafood, so be sure to try some of the local dishes like anchovy pasta, stuffed mussels, and fried calamari.

9. Shop for souvenirs: There are many shops in Portovenere where you can buy local handicrafts, such as ceramics, jewelry, and textiles.

10. Attend a festival: Portovenere hosts several festivals throughout the year, including the Feast of St. Peter in June and the Palio del Golfo boat race in August. These are great opportunities to experience local culture and traditions.