The very first wave of tourist began around 2011, which is when the location was opened for the very first time to travelers taking a trip with a certified guide. The Ukrainian federal government, nevertheless, cautioned at the time that travelers’ security wasn’t ensured.

A visitor strolls in front of the harmed 4th reactor at the Chernobyl nuclear reactor February 24, 2011.

Gleb Garanich/Reuters.