The project is based on seven activities that are to be developed until June with the aim of extending stays, including an ideas competition which has already received 40 projects from 18 local schools.
Of those, Obidos.com has selected 15 applications that could result in new businesses.
Transforming abandoned shipping containers from local ports into small studio flats or creating a floating restaurant on the Lagoa de Óbidos Lake are two of the ideas in the competition.
The winners were due to be announced this week.