The town occupies a hilltop at 650 metres (2,130 ft) of elevation, in theDaunian Mountains along theApennines. It is not far fromFoggia on the rich agricultural plains of theTavoliere delle Puglie in the east, nor fromNaples to the west. Population increases in summer when many of its migrant labour force return home to take up temporary residence and visit family.
The town originated as a settlement ofDaunians (or maybeHirpini) during the 1st millennium BC. Later it was part of theRoman Empire. Its name stems from Latinaqua cadiva ("falling water"),[3] which contrasts with nearby Acquatorta village ("channeled water").
In the past it had a much larger population. ANeapolitan army sacked it during theBourbon period. They took the town gates as booty, and these are still in the civic museum in Naples. These events are recorded on afrieze on the clock tower on the main square in the centre of the town. There is one remainingRoman arch at a former entrance to the town.
There has been extensive redevelopment of the former old quarter of town, which was abandoned after an earthquake in the 1930s. At this time a large portion of the population emigrated and established a colony inBuffalo, New York, in the United States.
^All demographics and other statistics from the Italian statistical institute (Istat)
^Antonella Lattanzi; Natalino Lattanzi (2015). "Accadia".Guida insolita ai misteri, ai segreti, alle leggende e alle curiosità della Puglia (in Italian). Newton Compton Editori.ISBN9788854185012.