Favorite secret grotto

Post your favorite secret grotto here and in spoiler tags where to find it, I haven't really found much of 'em yet but maybe this will get me looking.

My favourite secret grotto is

Spoiler (Highlight to read):

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The one in the goat farm in ordon. You go into the barn where the goats are and turn into a wolf use your senses and dig.

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Didn't know that one yet, gonna check it out tnx!

Originally Posted by triskiller

Didn't know that one yet, gonna check it out tnx!

Me nether, me too.

And which game are we talking about Twilight Princess, Wind Waker, Majora, Ocarina, or all ?

I think it's grottos from every game.
I posted that one because i think it's relatively unknown, i didn't find it until i had already completed the game.

SUPER SPOILER!!!!
(Srinck eyes or highlight to read/better)
I like the one in the desert. (West of grounds). It is on a hill like area which you can only get to by using the hockshot to get high enough. The hole is surounded by 3 skulls, I forgot what you get if you beat the challenge.

I like the huge one at lake hylia. Its a giant cave and requirs the lantern.

I knew about...maybe one of those...

Oh, and there's one in the southern feild of Hyrule. You need the double hookshot to get to it though. Other then that, it's fairly easy find. (It looks like a trench but it's not)

Most of you posted TP grotto's which, in fact, I was looking for, even though I would like to hear from some other Zelda game grotto's too if you know some.