- Hidden deep beneath the Cumberland Mountains in Grundy County, Tennessee, lies one of the world's most magical musical adventures, The Caverns Sessions.

Three million years in the making, pure acoustics offer music from the heart of the American experience.

Center stage and deep inside the mountain.

This time welcoming, Apocalyptica.

[upbeat metal music] - It's deep down sound in The Caverns.

Coming up next!

[upbeat drum music] - Hello Pelham!

Good evening, Caverns.

How are you guys doing tonight?

Ready for some good time with Apocalyptica?

[Crowd cheering] Great to see you all here.

Tonight is a special set with Metallica music, which means that we are expecting you guys to join us because you know these songs.

So are you ready to sing with us?

[crowd cheering] - Come on, Tennessee!

Are you ready to sing with us?

[crowd cheering loudly] Let me hear you, come on.

Hey, hey, hey, hey, hey, hey.

[crowd chanting and clapping] [upbeat metal music] [upbeat metal music] [upbeat metal music] [crowd singing] [upbeat metal music] [upbeat metal music] [crowd cheering] [indistinct singing] [upbeat metal music] [upbeat metal music] [crowd singing] [upbeat metal music] [crowd cheering] [upbeat metal music] [upbeat metal music] [upbeat metal music ending] [applauding and cheering] [upbeat metal music] [applauding and cheering] [upbeat metal music] [upbeat metal music] [upbeat metal music slowing] [crowd cheering] [mellow cello music] [mellow cello music] [upbeat metal music] [upbeat metal music] - Okay, come on, let's do this guys!

Come on!

Heard, hard, hard, hard!

[upbeat metal music slowing] [upbeat metal music slowing] [upbeat metal music] [upbeat metal music] - Master of Puppets, baby!

[audience cheering] [upbeat metal music] [upbeat metal music] [crowd sings, "Master master!"]

[upbeat metal music] [upbeat metal music] [upbeat metal music slowing] [cheering and applause] - I think most of you people know that metal people are the most kind, the kindest people on this planet, yeah.

[crowd cheering] Because metal music is always, it's all about honesty, acceptance and letting people be as they are.

Yeah?

[crowd cheering] That's the most beautiful thing in the metal community.

We are happy to be part of it.

[applause and cheering] [applause and cheering] [mellow cello music] [mellow cello music] [crowd singing gently] [mellow cello music] [mellow cello music] [upbeat mellow cello music] [upbeat mellow cello music] [mellow cello music] [mellow cello music] [crowd sings] ♪ And nothing else matters.

♪ [mellow cello music ending] [applause and cheering] [applause and cheering] - Beautiful place, Caverns in Pelham, and uh, are you enjoying your evening so far?

[crowd cheering] So, we should go home then.

- [audience] No!

- Home is actually really far.

We come from Finland and that's actually pretty cool.

[cheering] [upbeat metal music] [crowd cheering] [upbeat metal music] [upbeat metal music] [crowd cheering] [upbeat metal music] [upbeat metal music] [mellow cello music] [mellow cello music] [upbeat metal music] [upbeat metal music] [upbeat metal music ending] [cheering and applause] [cheering and applause] [cheering and applause] ♪