Valongo is located in Portugal (Águeda, Aveiro) and time zone Europe/Lisbon.
Places nearby are Águeda, Albergaria-a-Velha and Eixo.
Coimbra is 45 km away, Porto is 60 km away and Braga is 103 km away as the crow flies.
Distances from Valongo to the most important cities in Portugal and the world.
40.6166700°
-8.4500000°
University observatory in Rio de Janeiro, Brazil
https://en.wikipedia.org/wiki/Valongo_Observatory