'SENSITIVE ISSUE'
The ruins of Belchite -- which include a cathedral pockmarked with bullet holes and gouged by mortar shells -- were visited by 40,000 people in 2019 before the Covid-19 pandemic disrupted travel.
It has been dubbed "Spain's Pompeii", after the Roman city frozen in time when it was buried under ash from a volcanic eruption in 79 AD, said archaeologist Alfonso Fanjul.
The 48-year-old president of the Spanish Association of Military Archaeology heads a team of volunteers from around the world who clean and restore the village's original cobblestones.
"I think it's really one of the only places in the world that can this starkly remind you of something that has happened like this," said one volunteer, Ellie Tornquist, a 24-year-old student from Chicago in the United States.