Lisbon's miradouros are the closest thing the city has to a free attraction system. There might be fifteen or twenty official ones, depending on who's counting, and each frames the city differently. The popular trio — Miradouro da Graça, Santa Luzia, and Portas do Sol — sit along a natural walking route from the castle downhill through Alfama, and you can hit all three in under an hour. But the ones that tend to stick with people are the less-visited spots. Senhora do Monte, the highest, has a quietness at sunset that the lower viewpoints don't. The view from the garden behind the Igreja de São Pedro de Alcântara looks west toward the bridge and the Cristo Rei, and the geometric hedges give it a slightly formal atmosphere. Then there's the Miradouro do Adamastor in Santa Catarina, where a statue of the sea monster from Os Lusíadas looms over groups of people drinking Sagres tallboys on the grass. That one has the best atmosphere after dark, though it gets loud on warm weekends. To be fair, even the touristy miradouros deliver — you're not going to have a bad time at Portas do Sol with an ice cream watching tram 28 rattle past.

Portuguese azulejo tile work is everywhere in Lisbon, and the entire city is effectively an open-air ceramics museum. The most concentrated free examples sit inside churches — Igreja de São Roque in Bairro Alto has 17th-century blue-and-gold panels, and the interior is free to enter (the adjacent museum charges). The São Vicente de Fora monastery church is free and its azulejo panels depicting La Fontaine fables are remarkably detailed, covering entire cloister walls in narrative scenes. Down in Alfama, the Miradouro de Santa Luzia has two exterior panels showing Lisbon before the 1755 earthquake — a visual record of a city that no longer exists. The Linha de Sintra metro stations are worth a look too: Oriente station was decorated by different artists for Expo '98, and the tile work feels contemporary rather than historic. You can ride the metro to see them, obviously, but even standing on the platform counts as viewing public art. Mind you, the dedicated Museu Nacional do Azulejo charges admission except on first Sundays — but the free stuff on the streets and in churches could fill an entire day.

The biggest daily expense in Lisbon tends to be transport, and you can eliminate most of it by walking. The city is compact — Belém to Alfama is about 8 kilometers along the river, and the hills between Baixa and Bairro Alto are steep but short. Comfortable shoes on the calçada cobblestones matter more than you might expect; the stones get slippery when wet and some stretches are genuinely uneven. Water fountains exist but they're not as common as in some southern European cities, so carrying a bottle is practical. Free public restrooms are scarce — your best bet is ducking into a shopping center like El Corte Inglés or Colombo. For food on a zero budget, well, truly free food is hard to come by, but several churches and community organizations run meal programs. If you're just trying to spend very little, the municipal markets sell fruit cheaply and a bifana sandwich from a neighborhood counter might run you under two euros. The city's free WiFi (Lisboa WiFi) works in major squares and parks, though the connection quality seems to vary by the hour.

Belém is primarily known for its ticketed monuments — the Tower, the Jerónimos Monastery, the Coach Museum — but there's a significant free layer underneath. The Jardim de Belém and the Praça do Império gardens in front of the monastery are spacious and well-maintained, with fountains and enough lawn space to spread out. MAAT, the riverside art and architecture museum, has a free rooftop walkway that curves over the building and gives you a framing of the bridge and river that feels cinematic. The Padrão dos Descobrimentos is free to view from outside — the interior elevator costs money, but the monument is really about the sculptural figures on the exterior anyway, and you see those best from the waterfront. The Centro Cultural de Belém, which houses the Berardo collection, also has a free public terrace and gardens. Belém's pastéis de nata from Pastéis de Belém will set you back a couple of euros, but eating one warm at the counter while the sugar still glistens is arguably the most cost-effective pleasure in the city. That's technically not free, but the point stands.

Some Lisbon neighborhoods justify a visit purely for the sensory experience of being in them, no entrance fee required. Mouraria is probably the most textured — it's the old Moorish quarter, now home to Lisbon's most multicultural population. The sounds shift as you walk: Cape Verdean music from one doorway, Bollywood from another, fado from a third. The streets around Largo do Intendente have been revitalized over the past decade, and the square itself went from genuinely rough to genuinely interesting. Príncipe Real has a different energy — fashionable, slightly expensive, but the Jardim do Príncipe Real with its enormous cedar tree is free to sit in, and the weekend organic market in the garden adds some life. Madragoa, near Santos, still feels like a village — narrow streets, elderly neighbors chatting from windows, cats everywhere. It hasn't been polished for visitors. That might change, but at the moment it's one of the neighborhoods where the texture hasn't been smoothed out yet.