april 26 , 2016 marks the 30th anniversary of the chernobyl tragedy - and the site sees more visitors today than ever .
several private tour operators lead excursions into the exclusion zone , a nearly 50-kilometre contamination radius .
however , in order to enter , tourists must obtain a pass and go through multiple security check points .
though there are several abandoned villages in the zone , the most popular site to visit is the ghost town of pripyat .