Largest cities
Lisbon 567,000 pop., 2,832,000 urban aggl.
Porto 249,000 pop., 1,364,000 urban aggl.
Vila Nova de Gaia 189,000 pop.
Highest mountains
Mount Pico 2,351 m (7,713 ft)
Serra da Estrela 1,993 m (6,539 ft)
Longest rivers
Tagus 1,007 km (626 mi) total, 275 km (171 mi) in Portugal
Douro 895 km (556 mi) total, 322 km (200 mi) in Portugal
Guadiana 818 km (508 mi) total, 260 km (162 mi) in Portugal
Largest lakes
Alqueva Reservoir (artificial) 250 km² (97 sq mi)
Largest islands
Madeira 759 km² (293 sq mi)
São Miguel 745 km² (288 sq mi)
Terceira 400 km² (154 sq mi)
São Jorge 244 km² (94 sq mi)