Following the success of the HBO miniseries Chernobyl, one tour company reported that bookings to the Chernobyl Exclusion Zone located in Ukraine rose 35 percent. Now, series creator Craig Mazin is imploring the new wave of tourists to be respectful when snapping selfies at Chernobyl, Gizmodo reports.

A 2500-square-kilometer exclusion zone was established around the Chernobyl nuclear power plant shortly after its reactor exploded in 1986 and flooded the area with harmful radiation. The abandoned towns are still too radioactive for people to live there safely, but they have been deemed safe to visit temporarily with the supervision of a guide.

Chernobyl has supported a dark tourism industry for years, but thanks to the miniseries, photographs taken there are gaining new levels of attention online. News of influencers posing for irreverent selfies at the site of the nuclear disaster quickly went viral. Mazin tweeted:

Regardless of why people are visiting the site, being respectful in the presence of tragedy is always a good idea. It's also smart to resist leaving a tour group to snap the perfect selfie in some abandoned building: Tour companies warn that breaking rules and wandering off approved paths can lead to dangerous radiation exposure.

[h/t Gizmodo]