Radiant Chapel

The Radiant Chapel is a small random spawn dungeon in the second and third tier of the Gardens of Hope in Act IV of Diablo III.

A Resplendent Chest can be found here and a unique monster called Malfeas the Abhorrent. This area must be explored in order to complete the achievement Such Great Heights. No related quests exist for the area.

Note that the area appears to have a low spawn chance.