The Orb Weaver Buggy is one of the first rideable mounts worth chasing β but you have to steal an egg out of a spider den to get it, then hatch it before it spoils. Here's where the eggs are, how to grab one without dying, and how to hatch your Buggy.
Eggs sit in Orb Weaver dens. Picking one up aggros the nearby spiders, so either clear them first or grab-and-sprint. Known dens:
The webbed impression at the base of the Headless BURG.L landmark, on the Snackbar Front / Ceremony border β the most reliable nesting site.
Under the lamppost in the southeast corner of the Picnic Table area.
In the tunnel under the pine tree northeast of the cart, among the roots β guarded by multiple Orb Weavers and Spiderlings. Come prepared.
Stuck in the webs in the upper Hedge near the Fire Pit (the same hedge that hides an Optical Disk).
Hatching the Buggy also calls for some materials β roughly 3 Blueberry Leather, 4 Red Ant Mandibles and 3 Acorn Shell. The Blueberry Leather is the bit worth prepping ahead, so it's ready when the egg is.
Got your mount β keep exploring.