This island can be accessed by way of a mine tunnel from Jungle Island or a maglev car from Spike Island or even a footbridge from Temple Island. There are several possible questions you might have, so let's narrow it down a bit:

I have a question about the mine tunnel exit/entrance.

I have a question about the device in the middle of the lake

I have a question about the large boiler room or its controls.

How do I get up to the building at the top of the ladder?

I've figured out the ladder on the cliff and porthole entry, but I'm stuck.

I arrived here by way of the maglev, and I'm stuck!

How much of this island can I solve/explore without clues from other islands?

Can you show me a map of Boiler Island (a complete map, with some spoilers)?

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