Show Caves of Portugal - Jeskynì Portugalska
(Gruta) Algar do Pena (by appointment)
Gruta de Alcobertas (2nd SU in month+by appoint.)
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photo: © Pavel Gejdoš - gep(a)email.cz
Grutas de Säo Vicente (Madeira, closed)
Furna do Enxofre, Caldeira (Graciosa-Azores)
Gruta das Torres (Pico-Azores)
Gruta do Natal (Terceira-Azores)
Algar do Carvao (Terceira-Azores)
Gruta do Carvao/Coal Caves (Sao Miguel-Azores)