Lisbon must see/do?

Question is what do you want to see and do? Go to the library and check out guide books and travel DVDs.

I have the RS book and LP book but love hearing what others enjoyed too!

Fado and Port wine

The Mosteiro dos Jeronimos in Belem is incredible. The Museo Gulbenkian is very lovely. This might sound weird, but I really enjoyed the Oceanario. It compares favorably with major acquariums (National, New England, Monterey Bay) in the U.S. Anyhow, Lisbon is a wonderful place to just walk around and enjoy the views.

Jeronimos Monasterio in Belem.Also visit Monument to the Discoveries there.
Tile Museum.
Walking to riverfront from Rossio Sq.
Alfama
Gulbenkian Mueum.

Day-trip to Sintra.

The views from all the amazing miradouros (viewpoints) especially at sunset.

Riding the famous tram route.

Hearing fado in a small club.

The Gulbenkian Museum.

The tile Museum.

Well for me, fado...once and done forever.

I completely agree with comments from Bruce!

http://pt.museuberardo.pt for modern art
lunch in the food court at https://mercadodecampodeourique.pt

Tile Museum, wandering the very old Alfama and Mouraria neighborhoods

Definitely take the three walking tours in Rick's guide. Gulbenkian Museum is a must see. Trolley out to Belem to visit the monastery, naval museum and carriage museum. Take the Elevador de Santa Justa and Elevador da Gloria. Make sure to get the Viva Viagem card to take care of transportation needs and the Elevadores. Beware of pickpockets in crowded areas. :>(

This is going to sound a little odd, but we loved riding the metro just to see the amazingly beautiful stations.

The Aquarium-I went twice when I was there. Sintra-but don't use the bus, I think it's 57, that's supposed to go to the major sites on an established schedule. They didn't follow the schedule, there was a long line for the bus when it did get there, and they made a stop not on the schedule that was right before the one we needed, we got off, and by the time we got on another bus it was too late to see the sight for which we had already bought tickets.

Where would you go for dinner and fado music that's not touristy and reasonably priced?

Hi,
it's tough to go wrong in Lisbon, but I'd recommend the Gulbenkian & definitely try the restaurant there, night time at the plaza at Martim Monaz has live music, food trucks, some restaurants; cool place to relax and enjoy the diversity.

Hello @ashleengrant,

Lisbon has many things to do and see: I agree with the others - Jerónimos Monastery is a must (very touristy though), Monument to the Discoveries and Belém Tower; try the amazing "pastéis de Belém" also known as "natas" - a delicacy you won't forget ;)
Praça do Comércio and surrounding area is also a great place to explore - visit the historic quarters like Alfama; there are several viewpoints where you can admire the city ;) (beware of pickpockets close to the major touristy areas)

Enjoy Lisbon ;)

We really enjoyed just wandering around the various neighborhoods. Lots of great restaurants and shops. Go to Cervejaria Trindade. It's the oldest brewery in Lisbon. Even if you aren't into beer, the inside is beautiful. It looks like a German beer hall, but with beautiful tile murals on the walls. If you are into port wine, the Port Wine Institute (which is actually just down the street from Cervejaria Trindade.

Belem is definitely worth a visit as well, but as others have mentioned, it's very crowded. If you aren't interested in going in the monastery and doing the full tour, you can just walk into the church. Keep in the line to the right, which is for church entry only. It's usually much shorter.