New Map!
This is my interpretation of the Crystal Dome from Phandelver & Below | The Shattered Obelisk module, though I've included a variant for people not using that module that could serve as a great boss fight, interdimensional location or other set encounter.
The map depicts a massive black marble sphere floating above a fleshy landscape in a colorful cosmic and alien setting. A long black marble bridge leads to the sphere, accessible by a glowing purple pinhole located at the top of some stairs. Quick travel is possible through this portal to this section of the Void and others.
Here's a concept image of the location, to help visualize it:

And here's an example of the map designed after the module:

To download the Map Pack, please click on your Tier link below and the download URL will be listed there in map release order. These tiles have been added to the previous Seatower of Balduran links, so just downloading the previous links will show all of the files for this location now.
Tier 1 - https://www.patreon.com/posts/tier-1-dungeon-81146477
Tier 2 - https://www.patreon.com/posts/tier-2-world-map-81312503
Tier 3 - https://www.patreon.com/posts/tier-3-master-87793681
Tier 4 - https://www.patreon.com/posts/tier-4-master-87797001
As I mentioned, for people not running this module, I've created a variant map that has the interior of the marble sphere designed more for a Boss Fight and/or some other kind of set piece for your party to explore and potentially use.
Here's that map:
I tried to make the surface of the world alien and fleshy, and the colors of the sphere and surrounding cosmos vibrant and alien to most environments the party would explore.
As usual, we have a great Sprite by Katsudon Art of a Shield Guardian, which the module has positioned within the sphere to repel invaders/attackers:
I hope you enjoy the map and can create some fun adventures!!
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Crystal Dome is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.