A typical city center
Praça do Comércio · Praça do Comércio, 1100-148 Lisboa, Portugal
You'll need to take a ferry, don't worry it's easy and google maps will give you instructions.
Atira-te ao Rio · R. do Ginjal 69, 2800-284 Almada, Portugal
Decent museum with a beautiful cafe facing the ocean.
https://www.google.com/maps?sca_esv=559050992&rlz=1C5GCEM_enPT1022PT1022&output=search&q=maat+lisbon&source=lnms&entry=mc&sa=X&ved=2ahUKEwjg0b3Uj_CAAxVcTKQEHeu5AToQ0pQJegQIDRAB
Best pastel de nata imo.
https://www.google.com/maps/place/Pastéis+de+Belém/@38.6975105,-9.2054163,17z/data=!3m1!4b1!4m5!3m4!1s0xd1ecb452efd715b:0xffeff6c6b46d9665!8m2!3d38.6974565!4d-9.2032422?hl=en-US
Portuguese steak house, very affordable.
https://www.google.com/maps/place/O+Aregos/@38.7075845,-9.1585409,17z/data=!3m1!4b1!4m5!3m4!1s0xd1934834e79c6e3:0x37a33ee60592f697!8m2!3d38.7075845!4d-9.1563522?hl=en-US
Then head here for a drink
https://www.google.com/maps/place/Java+Rooftop/@38.707659,-9.1490766,17z/data=!3m1!4b1!4m5!3m4!1s0xd1935ec2756417f:0xe4d9c3821957d4bd!8m2!3d38.7076182!4d-9.1469028?hl=en-US