Yellow Brick Road
The Yellow Brick Road, or golden roads, was or were an important piece of infrastructure in many versions of the Land of Oz.
In at least one universe, it led from the heart of Munchkin Country all the way to the Emerald City at the centre of the Land. By the time of Acquaintanceship-982's visit to Oz, it, or a subbranch thereof, also led through the forest that divided Munchkin Country from Winkie Country. However, within the forest, the path was much more treacherous and derelict, with bricks missing every few feet. (PROSE: The Crew of the Copper-Colored Cupids in Oz)
In the 925th Universe, the “golden roads” were originally conceived by Monarch Pastoria, and had yet to be constructed when Doctor Know first decided to create Professor Wogglebug. (PROSE: Annals of the Jen: One Year of Jenny Over-There: Tetra-None Hepta-Oct and Doctor Know-It-All Talk it Out)
Behind the scenes
Famously debuting in the original 1900 Wonderful Wizard of Oz book, the Yellow Brick Road is in the public domain.