You could(/can?) also travel the exclusion zone as a tourist. Including to one of the excavator claws where the adventurous couch warriors are able to test their meter and make selfies.

The even dumber are getting smuggled in for illegal tours. Meaning you get somebody who knows the area and run past the patrols and sleep in the ruins. Quite stupid but there is youtube. They are also coming after the people who stole all the scrap metal.

Chernobyl is also not the only place, people also visit abandoned cold war bunkers which can look quite amazing. But are also often heavily contaminated and off limits to the public.

Some examples are at @ExploringtheUnbeatenPath (NATO command bunker) and @shiey (Chernobyl) on youtube. Legal options are already quite nice and dont give you too much cancer. In Russia you will also go to Prison for a very long time when caught climbing a derelict antenna, let alone visiting bunkers. If i recall they got very annoyed when Russian teens climbed all the Stalin towers.