There are several attraction destinations in Lisbon, in which the most outstanding are: Lisbon tiles, Cabo da Roca, portuguese sidewalk, the lamps of Lisbon and the Estoril Casino.
For those more interested in museums and monuments, it will be interesting to know the José Franco Museaum Village, Vasco da Gama Aquarium, Free whater Aqueduct e o Augusta Street Arch.
For the best views, you might be interested in seeing the Altis Avenida (terrace), Amoreiras 360º Panoramic View or even the Roca Cape.
There is no lack of seaside areas in Lisbon, but there are some that stand out, namely, Oeiras Ocean Pool , Arrábida and Sesimbra beaches, and Costa da Caparica beaches and Ericeira beaches.
For the more adventurous, areas like Adegamãe, Adventure Park, Badoca Safari Park e Birds & Nature Tours Portugal, can be good places to visit.
For the little ones, some of the places indicated above are great, but there are other places that can stand out, they are the Palmela Castle, Pirescoxe Castle, São Jorge Castle, and Sesimbra Castle.