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Discovered in 1985 by Mr. Joaquim Pena, following the dismantling of a limestone bench for the production of sidewalk stone, the Pena Cave - so named in honor of its discoverer - it's a very interesting cavity equity point of view, integrating the largest underground room known in Portugal (125,000 m3 in volume). From the top of about 40 m of unevenness, it opens to the look of who visits it, a magnificent underground landscape whose aesthetic aspect assumes an unusual dimension, through a huge profusion of speleothems.

 

Given its biophysical characteristics and geographic location, it was selected to install there the 1st Underground Interpretation Center in Portugal. After three years of studies was opened on June 5th, 1997. . Open to the public (it has a technical support building, elevator, outdoor auditorium and a “speleodrome”), represents a unique experience of descending to the depths, combining the importance Scientific aspects to didactic and tourist aspects of high interest

 

Algar - cave with a vertical opening.

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  • Algar do Pena (CISGAP) - Underground Interpretation Centre

  • Discovered in 1985 by Mr. Joaquim Pena, following the dismantling of a limestone bench for the production of sidewalk stone, the Pena Cave - so named in honor of its discoverer - it's a very interesting cavity equity point of view, integrating the largest underground room known in Portugal (125,000 m3 in volume). From the top of about 40 m of unevenness, it opens to the look of who visits it, a magnificent underground landscape whose aesthetic aspect assumes an unusual dimension, through a huge profusion of speleothems.

     

    Given its biophysical characteristics and geographic location, it was selected to install there the 1st Underground Interpretation Center in Portugal. After three years of studies was opened on June 5th, 1997. . Open to the public (it has a technical support building, elevator, outdoor auditorium and a “speleodrome”), represents a unique experience of descending to the depths, combining the importance Scientific aspects to didactic and tourist aspects of high interest

     

    Algar - cave with a vertical opening.

  • Lisboa e Vale do Tejo

  • Santarém

  • Serras de Aire e Candeeiros Nature Park

  • Instituto da Conservação da Natureza e das Florestas, I.P. (ICNF, I.P.)

  • Yes.

  • Access from:

    - Leiria - IC2 and N362 to Alcanede. There take N361 and then Rua da Cooperativa to Barreirinhas/Pé da Pedreira. In Pé da Pedreira take Rua Chouso do Poço and follow to Algar.

    - Lisboa - A1 to Circular Urbana de Santarém Dom Luís I in Santarém. Exit Circular and folllow to N3, N362 to Alcanede. There follow to Pé da Pedreira and take R. Chouso do Poço to the cave.

  • Interpretation Centre

  • Exhibition | interpretation space of natural and cultural values

  • Centro de Interpretação Subterrâneo da Gruta – Algar do Pena (CISGAP)

    Vale de Mar

    2025 ALCANEDE

    E-mail: pnsacvisitas@gmail.com

    Telephone: (00351) 243 400 630

  • Consulte o CISGAP

  • Visits only by appointment: 243 400 630 or pnsacvisitas@gmail.com

  • Yes

  • For people in wheelchair only until 35 meters deep.