The apartment is located in a lovely & quiet neighbourhood. Gas station is nearby for quick shopping and for anywhere else Uber/taxi will pick you up in minutes. Host offers bikes (6) so it's easy enough to go for some sightseeing. Host was very communicative (thank you Nelson!). If you're looking to go out a lot I'd suggest staying in Estoril/Lisbon instead as Cascais tends to be awfully quiet in late summer at least.