Fans have been developing theories since players noticed the presence of the obelisks, and more than a few of them were right about what they could mean.

Source: https://screenrant.com/dnd-black-obelisks-5e-phandelver-vecna-campaign-multiverse/

In many ways, it’s otherworldly, with its prehistoric rock forming seemingly impossible arches, fists, and obelisks.

Source: https://www.forbes.com/sites/rebeccadeurlein/2023/05/15/fathers-day-gift-guide-the-best-us-trips-for-adventurous-dads/