Eli5: what happens to the areas where nuclear bombs are tested?

Question

Eli5: what happens to the areas where nuclear bombs are tested?

In: 3652

Answer 1

Most were cleaned up, the Trinity site can be visited a few times a year (I’ve been there). Other testing sites were Algeria, Australia, and south Pacific (Marshall Islands/French Polynesia). The radioactive debris from Bikini atoll tests were cleaned up and placed under a concrete dome.

GPS: 11.552720, 162.347114

From the 1960s or so they were all tested in tunnels deep underground.