I'll 'ave some of this:-
https://www.zipworld.co.uk/adventure/quarry-karts
The Mrs want's to do the big fast zip line there - no chance will I as I don't light heights, but this will suit me - she just looked at me like I was mad.... 🙂
Did the zipline at Easter, its steady away. Those karts look good fun.
Fancy that as well. Can recommend the forest coaster, although that's a different site. Did that this summer and it was great. Took our three year old on, went as fast as possible with her and she just laughed her head off all the way down! Quite expensive and over pretty quickly but I'd do it again.
Head over to the zip world site at Blaenau it's on the same site as Antur Stiniog and book an uplift while the Mrs Zip's
A mate and I looked at doing the karts earlier in the year. He found out that they'd had to slow the karts down quite a bit just after opening. Lots of chicanes apparently added to the route.
No sauce for this, btw, but having done the fast zip I'd echo the advice above and go Blaenau and do the zips there/go down slate mine/ride a bike.
We've done Bounce Under, but the Mrs want's to do the fast zip instead. I'd do the blue at Antur - the rest would be too big for me (trail bike, no full face, and mainly an XC rider).