It was built between 1885 and 1888 to defend France against invasion from Italy .
The Fort de Viraysse is a fortification complex in the Cottian Alps overlooking the Ubaye Valley .
Fort de Viraysse was built between 1885 and 1888 to defend France against invasion from Italy .
The Fort de Viraysse is a fortification complex in the Cottian Alps overlooking the Ubaye Valley .