Favourite 'unconventional' or 'hidden gem' workouts?

Hi everyone! Hope you're well :)

I've worked out with Fitness Blender for quite some time now (mostly strength and HIIT) and I'm looking for something a bit different to throw in the mix.

I'd like to hear what are your favourite 'unconventional', 'hidden gem' or 'unique burn' workouts?

For reference, I recently found this Advanced Functional Strength, Balance and Core Workout https://www.fitnessblender.com/videos/brutal-low-impact-workout-advanced-functional-strength-balance-and-core-workout and loved the new kind of challenge!

What's your favourite Fitness Blender workout to spice up your regular training?

Thank you!