Philippe Mille: Amazing place!! Like being in a museum, but you can also have great cocktails or a cold beer and play snooker while "visiting". Heard is the world's' biggest miniatures collection.
Otel.com: This 10-acre lush garden in Principe Real is a great place to walk around beautiful and exotic plant species. This is also a famous place for plant and other scientific research.
Otel.com: Located at Santa Maria de Belém, this is one of Lisbon's best venue for many international exhibitions and musical venues. You can hang out at the their terrace cafe and get great city views.
Otel.com: At the northern bank of the Tagus River lies the Discoveries Monument, which celebrates the Age of Exploration of the 15th and 16th centuries. Home to the historical statue of Henry the Navigator.