Pedreira_do_Avelino_Natural_Monument
Pedreira do Avelino (Portuguese: Avelino's quarry) is a natural monument in Zambujal, Sesimbra, Portugal. The site contains an important set of dinosaur footprints from the Upper Jurassic (155 million years ago). The main slab is about 15 metres (49 ft) long by 10 metres (33 ft) wide, and is inclined (30°), which facilitates its observation and pedagogical use. It contains 5 tracks and 108 total footprints.[1][2][3]