I agree with the sentiment, but it's very far from being devoid of permanent residents. That's maybe true for a couple of downtown neighborhoods, but definitely not true for the city as a whole.
Meanwhile, every single real estate developer / agent sets their prices incredibly high hoping to sell or rent out the property to those mythical "wealthy expats". I saw a stat somewhere that less than 0.2% of all real estate transactions in the country each year involve foreigners, and yet everyone blames them for high real estate prices.
Seriously? How about:
- Avenida da Liberdade
- The Botanical Garden in Principe Real
- Parque Eduardo
- The beautiful gardens around the Gulbenkian Museum
- Jardim da Estrela
- Tapada das Necessidades
- Jardim do Principe Real
and one of the prettiest urban neighborhood green spaces I've ever been to: Jardim Fialho de Almeida
Edit: formatting