please help me find Alien arena

[1 demon 1n lxst etern1ty]

I've already dug through almost a full cycle in the crystal biome and found a couple of dungeons without chests, but I still haven't found the alien arena. There are some methods that will make it easier for me to find them. Honestly, I'm tired of digging for 8 hours and not finding a single alien chest. Because I can't go and kill an Atlantic worm.

[Lunacy]

I finally found one in my world, it wasn't even in the shimmering expanse ring, but a shimmering island about 100 tiles sooner.

[NeloDante]

I was about to make the same post, I have been days looking for this thing and I have done a full circle... Is there any trick on how to find these or what?

[Saki]

i look for days too. luckily i found mine on the right side close before the circle starts in the water area for me.