Lagos, Portugal is a charming town in the Algarve region, known for its beautiful coastline, beaches, and historic center. Here are some of the best things to do in Lagos based on the search results:

1. Explore the historic center of Lagos, which has cozy squares and a labyrinth of narrow streets. Some of the places to visit include Plaza Infante Dom Henrique with the Church of Santa Maria de Lagos, Praça Gil Eanes and adjacent Rua da Porta de Portugal with colorful houses, and the cozy Praça Luís de Camões.

2. Visit the Ponta da Piedade, a stunning coastal area with caves and grottos. You can take a boat tour from Lagos Marina to visit the sea caves and spectacular rock formations of Ponta da Piedade.

3. Spend some time at the beach. Lagos has several beautiful beaches, including Praia Dona Ana, Meia Praia, Praia do Porto de Mos, and Praia do Camilo.

4. Take a boat tour or go kayaking. Most boat tours depart from Lagos Marina, where youll also find several restaurants, cafes, and pubs.

5. Hike the Seven Hanging Valleys Trail, which offers stunning views of the coastline.

6. Visit the Lagos Living Science Center, where you can join a workshop to program a robot or create a slimy elastic monster.

7. Try some local delicacies and learn about the best spots in Lagos for eating seafood, as well as some dishes to try out and local history and culture. You can do this by taking a food and culture tour with a local guide.

8. Play golf at one of the many golf courses in Lagos, such as Penina Championship, Golfe do Morgado, and Vale da Pinta.

9. Go on a forest adventure at Luso Aventura, which offers high rope walkways, vertical nets, cobweb and monkey bridges that span the forests just to the east of Lagos.

Lagos is a small town, and you can see everything in a few hours. However, if you want to visit all the best places in Lagos mentioned on this list and spend some time at the beach, take a boat tour, or go kayaking, you can easily spend an entire day here.