Each year, millions of so-called “dark tourists” flock to these sites to witness what remains of their tragic pasts https://on.natgeo.com/2CSvi6d

Each year, millions of so-called “dark tourists” flock to these sites to witness what remains of their tragic pasts https://on.natgeo.com/2CSvi6d 

https://twitter.com/NatGeoTravel/status/1112942865099972609