the route of the Alvados Caves visit is 450 metres long?!...
the route of the Alvados Caves has 11 flights of stairs?!...
the route of the Alvados Caves visit has 78 steps?!...
the exit tunnel of the Alvados Caves is 100 metres long?!...
the Alvados Caves have two inside tunnels of 23 and 29 metres each?!...
at Alvados there are 12 small lakes at different levels across the caves?!...
the Alvados Caves are 1 km away from the Santo António Caves?!...
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