Lisbon is the capital of Portugal and an important city located on the Tagus River. The author visited Lisbon as part of an Erasmus project, staying in the small town of Marinha Grande. Over the trip, they visited several landmarks in Lisbon like the Jerónimos Monastery and Tower of Belém. They also traveled to other cities like Coimbra, known for its university, and Fátima, home to an important Marian sanctuary. The trip provided opportunities to learn Portuguese, experience local culture through food and performances, and meet new people from different backgrounds.