Palace: Three Rock Palace (it's hidden until you reveal it)
Town: Mido (it's difficult to get to since you have to go through Death Mountain first)
Item: Hammer (same as Mido, it requires dealing with DM, suppose it could be considered hidden)
The guesses are educated guesses anyway .. all 3 are challenging (though I think the Great Palace & Ocean Palace are harder), 2 are hidden, and the Hammer would be the 1 that AwesomeLink got right.
Bravo :clap: One of your answers is correct and it is not the same correct answer that was given by AwesomeLink. Two zeldadungeon members have guessed and two correct answers have been given. The Zelda knowledge in this Forum is above great it is fabulous!