Be mindful of petty crime Pickpocketing and bag-snatching are the main concerns to keep in mind, especially when traveling on the trams and metro in Lisbon or Porto. Avoid moving around during the crowded peak times, and don't zone out on your phone.

Lisbon is generally very safe, but you should be most careful of petty theft and pickpocketing in crowded tourist areas. Specifically, the iconic Tram 28 is a primary target for professional pickpockets who take advantage of the packed, standing-room-only environment. You should also be wary of "drug dealers" in the Baixa and Bairro Alto districts who may aggressively offer substances that are actually just crushed herbs or flour; they are scammers looking for an easy target. Be careful walking on the traditional "Calcada" (mosaic) sidewalks; they are incredibly beautiful but become extremely slippery when wet or even just worn down by time, leading to frequent slips and falls. Finally, always check the menu prices at restaurants in the Rossio and Praça do Comércio squares, as these "tourist traps" often have hidden service fees or charge high prices for the appetizers (couvert) they place on your table without asking.