Why is chernobyl dangerous to visit?

Chernobyl is dangerous to visit primarily due to the residual radioactive contamination from the 1986 nuclear disaster, which can pose serious health risks to unprotected individuals. Certain areas still contain high levels of radiation, and prolonged exposure can lead to acute radiation sickness or increase the risk of cancer. Additionally, the decaying infrastructure and potential for unstable structures create physical hazards for visitors. While guided tours often mitigate some risks, caution is always advised.