Dólmen das Pedras Grandes

Anta/Dolmen - Neolithic (648)
The Anta das Pedras Grandes is located in the current Bairro do Casal Novo, Caneças, west of the megalithic set of Trigaches and close to the Anta das Batalhas (CNS 649), which is currently destroyed. This megalithic monument presents a polygonal chamber, composed by seven limestone and basalt orthostates, measuring roughly 3m in height, and with a small access corridor. Traces of the mamoa were found on the outside. The artefact collection recovered inside this domen is reduced, being mainly composed of human osteological remains, silex lithic-flaked artefacts (small blades, a trapezium, scrapers, and punchers), hammer stones, a quern, and an amphibolite axe. A large and diverse quantity of lithic-flaked artefacts were recovered on the outside of the monument (lamella, blades, scrappers, punchers, and lithic remnants), which may hint at a lithic scatter. The architectonic characteristics of this dolmen combined with the exhumed artefacts and absolute dating allow to frame its construction and use during the late 4th millennium BC (Late Neolithic).


The monument is inserted in an urban park. Possibility of book guided visits, preferably at Wednesdays.

Visit conditions

Free entrance


Opening hours: Wednesday 10.00 - 12.00 14.30 - 17.00.


    How to get there? Best practices

    Best practices

    Good practices when visiting archaeological sites

    To visit an archaeological site is to connect with our origins, to understand our path and evolution as a species integrated in the environment, and to respect and safeguard our heritage so that future generations can also visit and enjoy it.

    Walking the paths and enjoying the structures and archaeological pieces that survived over time, fosters the understanding of what is different, but also of what is common among different populations: basically, what identifies us as Homo Sapiens.

    More than just vestiges and ruins of the past, archaeological sites showcase our capacity for creative thought, adaptation, interconnection, comprehension and resilience. Without these traits we would not have been successful as cultural beings participating in an ongoing evolutionary process. These sites also allow to consider choices made in the past thus contributing for decisions in the present to be made with greater awareness and knowledge.

    Archaeological sites are unique and irreplaceable. These sites are fragile resources vulnerable to changes driven by human development. The information they keep, if destroyed, can never be recovered again.

    As such, the Directorate-General for Cultural Heritage (DGPC) invites all visitors to enjoy the beauty and authenticity of these sites, while helping to preserve them for future generations by adopting the following set of good practices:

    • Respect all signs; 
    • Do not try to access fenced areas; 
    • Do not climb, sit or walk on archaeological structures and remains; 
    • Respect areas where archaeological excavations are being carried out, not disturbing them; 
    • Do not collect materials or sediments;
    • Do not write or make graffiti on archaeological structures; 
    • Put the garbage in appropriate containers. If none exist, take the garbage with you until you find a suitable container; 
    • Leave the archaeological site as you found it; 
    • Do not drive bicycles or motor vehicles over archaeological sites; 
    • Respect and protect the plants and animals that live in the areas surrounding archaeological sites;
    • Report signs of vandalism or destruction to DGPC or Regional Directorates of Culture (DRC);
    • Share the visiting experience and the archaeological sites, as a way of raising awareness to their preservation and making them better known;
    • Do not buy archaeological materials and report to public security authorities, DGPC or DRC, if you suspect that archaeological materials may be for sale.

    Further information:

    AIA / ATTA (2013) – Guide to best practices for archaeological tourism. 

    Raposo, J. (2016) – Código de conduta para uma visita responsável a sítios arqueológicos. In Sítios arqueológicos portugueses revisitados: 500 arqueossítios ou conjuntos em condições de fruição pública responsável. Al-madan, 2ª série, p. 20 – 77. 

    DGPC contacts

    Phone: +351213614200 | Email: informacaoarqueologica@dgpc.pt


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