Transport
- wwwmichelin.com (route planner)
- www.airberlin.com
- www.transavia.com
- www.virgin-express.com
- www.cp.pt (Portugese railway company)
- www.rede-expressos.pt (bus company)
- www.avis.com.pt (car rental)
- www.hertz.com.pt (car rental)
- www.budget.com (car rental)
- http://vakantie-a-la-carte.nl (car rental)
Region
- www.pbase.com/diasdosreis/sao_martinho_porto (great pictures of São Martinho do Porto!)
- www.visit-sao-martinho-do-porto.com (Tourism office of São Martinho do Porto)
- http://parcours.com.sapo.pt/galerias/obidos/foto.htm (overview; region map + pictures)
- www.santuario-fatima.pt/portal/ (Santuary of Fátima)
Sports and activities
- www.escoladeveladalagoa.com (sailing and surfing school, lagoon of Óbidos)
- www.surf-holiday-portugal.com (perfect surf beaches nearby!)
- www.sam-sam-com (parapente)
- www.voo.no.sapo.pt (delta flying)
- www.o-eusebio.org (horseback riding and speleology)
- www.cnsmp.org (beach tourism and watersports activities in bay of São Martinho do Porto)
- www.holiday-rental-portugal.com/Design/Assets/play-golf-in-portugal.html (Golf)
- www.standupportugal.com (paddle boarding)
Others
- http://www.holiday-rentals.co.uk
- www.opzijnbest.nl
