Only ruins scattered into a thick forest of holms and maples are silent witnesses of the town's intricate history.

Although there is some debate, the town was most likely founded by Etruscans as a military outpost called Careia, and slightly expanded during Roman rule. During the Germanic invasions, the town was abandoned for the first time, but it wouldn't be the last.

Galeria was populated again in early middle ages, when Pope Adriano I and later Gregorio IV deemed it appropriate to reconsolidate the Northern Territories of the Pontifical State in 7th and 8th century, but Saracens made short work of the revived city during a raid just a few years later. The Orsini family started rebuilding in the 13 century, and Galeria slowly blossomed back into glory, enjoying being passed around the Italian Renaissance from family to noble family. Alas, misfortune would befall the grand city once more, this time suffering enduring tragedy that it would not recover from.

Falling under the property of the Sanseverino family, Galeria went into an irreversible decline. Mutated from a fortified settlement to agricultural area, the demographic ratio slowly but steadily decreased, until plague took its toll on the last fringes of the populace. During the second half of the 18th century inhabitants of Galeria started to die in a mysterious way, and only recent researches have identfied the cause – the malaria that were infesting areas of Agro Romano. In a macabre discovery, it was found that the survivors abandoned Galeria so quickly they left almost all of their belongings in their houses, as well as the bodies of those who succumbed to the malaria lying unburied. Corpses were still found on carts on their way to the cemetery.

Galeria was completely abandoned in 1809, and since then nature has taken back the streets and buildings, creating a suggestive scenario. It is now a natural park with a unique ecosystem of fauna and flora, where foxes and hedgehogs find shelter in the ruins and herons can find nourishment in the nearby Arrone river during their migrations.