There are no hostels in Cantanhede but there are other types of accommodations...

"Located in the heart of Cantanhede and surrounded by Coimbra, Aveiro and
Figueira da Foz, the Marialva Park Hotel has 64 rooms and 2 suites all of them
with terrace, air conditioning, mini-bar, cable TV, telephone, free internet access
and hairdryer.
For personal or professional events, conventions or congresses, the Marialva Park
Hotel has free wireless internet access, 3 banquet rooms, business centre,
restaurant, bar, parking and private garage.
"
Lisbon / Cantanhede...