Porto topographic maps

There are no full-days below freezing, yet temperatures below 0 °C (32.0 °F) can occur at the height of winter during the night and early morning. The city possesses a microclimate and is considered the region least subject to frosts in all northern Portugal. Cold waves are absent and snowfall is firmly…

Average elevation: 25 m

Average elevation: 240 m

Average elevation: 73 m

Average elevation: 81 m

Average elevation: 138 m

Average elevation: 294 m

At the end of the Bronze Age, settlements expanded into castros, proto-urban agglomerations at high altitudes. These existed in the northwestern regions of the Iberian Peninsula and predominated until the 1st century. Remnants of castros remain throughout the municipality, the most notable being Castro of…

Average elevation: 44 m

Average elevation: 368 m

Crestuma–Lever Dam is a 25.5 m tall (height above foundation) and 470 m long gravity dam with a crest altitude of 25.5 m. The volume of the dam is 205,000 m³. The spillway with 8 gates is part of the dam body (maximum discharge 26,000 m³/s).

Average elevation: 72 m

Average elevation: 45 m

Average elevation: 77 m