Lisbon Sights

  1. Núcleo Arqueológico

    Under the baixa is the Núcleo Arqueológico, a web of tunnels believed to be the remnants of a Roman spa (or a temple) and probably dating from the 1st century AD. You can descend into the depths via the Banco Comercial Portuguesa on a guided tour run by the Museu da Cidade on Wednesday and Saturday. You'll need to phone ahead to book.

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