The Roman Galleries
In the center of downtown Lisbon (on Rua da Conceição), visitors can walk beneath the street and visit ancient Roman tunnels. Discovered nearly 20 years after the 1755 Great Lisbon earthquake, the tunnels are believed to date back to the first century A.D. Though they aren’t long (a walk-through takes about 20 minutes), they are somber and possibly frightening to anyone who is afraid of the dark. Their intended purpose may be less scary; the Portuguese government believes they were used as storage and as underground infrastructure. If this exploration sounds appealing, we recommend contacting the Lisbon Tourism Office for tour dates and times, as the tunnels are not always open to the public.