
The Torre Belem used to be from where the Portuguese explorers ships departed for the big journey discovering the world and the symbol of the portuguese naval power during the Age of Discovery.
Padrão dos Descobrimentos was built in 1940 for the Portuguese World Exibhition, this monument with the shape of a caravel celebrates de 500th anniversary of the death of Henry the Navigator and behind him you can see another 32 figures that where important during the Age of the Portuguese Discoveries.

Opened since 1998 for the World Exhibition the Oceanário de Lisboa is a memorable visit for both adults and children. It represents the various oceans and counts with numerous species that make of it an entertaining and educational program. From the architecture of the building to the surrounding location and the visit itself, the Oceanario is one of the attractions not to miss in Lisbon.
Open every day from 10am to 7pm

Museu dos Coches is one of the most visited museums in Portugal. Located in the Old Royal Riding School of Belem, houses an unique collection of carriages from the 17th to the 19th century. This is the most notable exhibition in the world within the genre and will have a new and more modern home in 2012. Make sure you give them a visit. On Sundays they have special activities for families.
When climbing the hill of Alfama in the direction of the castle (I advise to take tram 28 as it's a steep hill) you will find a small garden on the right hand side that doesn't stands for a particular beauty, at least until you get to the balcony from where you will find some of the most amazing views of the city. From there you will have privileged view of the narrow streets of Alfama neighborhood and the beautiful Tagus river. Have a look at the tile panels, one representing Praça do Comercio before the earthquake and the other, the Christians attacking the castle.