Johannes Maaßen has a fun idea, to recreate locations from the Lord of the Rings in the LEGO Heroica style. These are MOCs in themselves, but could also be used in Heroica gaming. Here is his Weathertop. Note that it has the little campfire in a hollow below the summit, then steps up to the ruins at the top.
Here is the Golden Hall of Meduseld.
My favorite, though, is the Ithilien Crossroads. Note the detail of the decapitated statue of the kings, with the head lying off to the side with a crown of flowers.