I've probably walked past it numerous times....Where is it?!!
pixel_player13101183 In snaefellsjokul volcano near the end, marked on maps here: https://www.diggysguide.com/centre-of-the-earth/sn%C3%A6fellsj%C3%B6kull-volcano
pixel_player13101183
Have you checked out the relevant Wiki pages, quests, maps, videos, guides, walkthroughs & hidden gifts.
In certain scenarios it is much more easier to consult, study & follow the maps instead of the videos.
You can easily find the solutions to puzzles if you check out the walkthroughs & maps.....everything is clearly & concisely highlighted.... including hidden gifts.
The Wiki pages & this forum will become your best friends throughout your Diggys Adventure journey.
Wiki page https://wiki.diggysadventure.com/index.php?title=Centre_of_the_Earth
Wiki Maps https://drive.google.com/drive/folders/1Qq2fiREPAmZ8W3XTH6me05G6d-Qmr8_J
Walkthrough Articles https://forum.pixelfederation.com/diggysadventure/d/190467-centre-of-the-earth-walkthrough-articles
Wiki Videos - PC https://bit.ly/centre-of-the-earth-event
Wiki Videos - Mobile https://www.youtube.com/playlist?list=PLvGcAUPohOJ3ubiNNM2_jw9pB4xaUGqPJ
Fan Based Websites https://forum.pixelfederation.com/diggysadventure/d/190422-centre-of-the-earth-maps-videos-hidden-bonuses-information-more
https://forum.pixelfederation.com/diggysadventure/d/190427-centre-of-the-earth-videos-maps-energy-cost-details-pcmobile