Portugal has several beautiful botanical places worth visiting. Here are some of the most well-known ones:

1. Jardim Botânico da Universidade de Lisboa (Lisbon University Botanical Garden) - This garden is located in Lisbon and features over 18,000 plant species from around the world, including many rare and endangered species.

2. Parque Terra Nostra (Terra Nostra Park) - Located on the island of São Miguel in the Azores, this park features a large botanical garden, including a thermal pool with iron-rich water, which is said to have therapeutic properties.

3. Jardim Botânico do Porto (Porto Botanical Garden) - This garden is located in Porto and features a large collection of plant species from around the world, including many tropical and subtropical species.

4. Parque de Serralves (Serralves Park) - Located in Porto, this park features a large botanical garden, as well as contemporary art exhibitions and a modern art museum.

5. Jardim Botânico da Universidade de Coimbra (Coimbra University Botanical Garden) - This garden is located in Coimbra and features a large collection of plant species from around the world, including many medicinal and aromatic plants.