Auckland, New Zealand at $898 RT

On North Island, there's a cave that looks like something straight out of Avatar...

The Waitomo caves are ethereal in any lighting, but turn off the lanterns and millions of pale blue glowworms dot the rock walls like gooey stars! It's so wild that Nat Geo made a 360° video so you can see what it's like inside by clicking and dragging the screen.

And it's not just the worms either - this cave system has other tunnels full of stalactites and opportunities for black water rafting.

We also hear it can make a good combo day trip with Hobbiton (which made the cut on our list of movie sets worth visiting), so you can knock out two big excursions on the same day.