Waychest is a PvE survival server on Java 1.21.11 that feels like you are starting in your own little world even though everyone is actually in one shared world.
You begin in something called a Journey with your friends. It has a random spawn point and its own progress path. You can also make more than one Journey so each one starts in a different place and has different partners.
The whole point is exploring and building then slowly realizing other people are out there too. Special Waychests can lead you across the world and reward you for finding them. Later you can craft and place your own Waychests to point future Journeys toward your builds.
There is also a Waychest Flight minigame where you craft an Elytra and fly through rings. If you finish it you end up at a Waychest made by a stranger. Fast travel exists too but you have to discover warp points first to unlock them.
