Uluru

Despite the Anangu tradition that allows only certain elderly males to climb the rock, tourists were allowed to climb Uluru until 2019.

An excerpt from the article 19 facts about Uluru
To help with the climb, a metal chain was installed in 1964, but as of October 2019, it is no longer available. 

Princess Diana Spencer with Prince Charles (now King Charles III) climbed Uluru in 1983.