Caves and Karst Heritage

Explore the geological and archaeological heritage of the Serras de Aire e Candeeiros Natural Park. This collection features the extensive Gruta do Almonda, the largest underground cave system in Portugal, and the Algar do Pena, which contains one of the country's largest subterranean chambers. The list includes the preserved Roman road of Alqueidão da Serra and the unique Anta-Capela das Alcobertas, a megalithic dolmen converted into a Christian chapel. These sites showcase the region’s limestone formations, prehistoric remains, and long-standing human interaction with the karst terrain.

Castelo de Porto de Mós

Castelo de Porto de Mós is a castle in Portugal. It is classified as a National Monument.

Gruta do Alviela

Source of the Alviela River and part of one of Portugal’s most important karst systems. It has historically supplied water to Lisbon via the Alviela Aqueduct.

Alcobertas

Alcobertas is a civil parish in the municipality of Rio Maior, Portugal. The population in 2011 was 1,923, in an area of 32.03 km².

Estrada Romana do Alqueidão da Serra

A well-preserved segment of a Roman road featuring original limestone paving stones, illustrating the region's ancient transport infrastructure.

Gruta de Alcobertas

An archaeological cave site containing evidence of human occupation dating back to the Neolithic and Bronze Age.

Gruta do Almonda

A vast underground network and archaeological site where the 400,000-year-old Aroeira skull was discovered, representing a significant find for human evolution studies.

Algar do Pena

A vertical cave system featuring a massive underground chamber measuring approximately 125,000 cubic meters, making it one of the largest in the country.