This is part of the warning sign on the entrance to the steps to the observation tower at Tasek Lama. The translation is almost word-for-word, particularly with the use of the adverb
carefully being translated directly from the Malay
berhati-hati.
It is rare to see such poorly written English on public signs in Brunei, as usually the standard of English on signs is pretty good. And it is surprising that so much was spent making this sign without getting the English checked first.