Mini-Adventure: The Titan Gates (D&D 5e)

An adventure for your 5th edition campaign that's written for 11th-12th level play. With a little modification can be used anywhere from 3rd to 16th level.

This has not one or two but THREE different maps as PCs face off against giants with portals in their chests, the mystical gateways dragging the adventurers into the dangerous challenges of the Titan Gate Gladiators—those that survive are enshrined in history as champions and gain powerful allies, as well as the ability to rapidly traverse parts of the world thanks to their hard-fought allies.

Brilliantly designed by  Andrew Engelbrite; illustrated by Kevin Shea; maps from Dyson Logos.