Does your world have any features that would be uncommon on Terra Firma?
There are a few! The two easiest examples are Anseth's Crystalline Conclave and the Vine Sea of Tresamer.
The Conclave is, as you'd imagine from the name, crystalline. More accurately, it's an enormous range of crystal formations extending dozens of miles, and so old that many Ansethi civilizations carved fortresses, cities and temples into its walls. It's predominantly made from quartz, malachite, carnelian, moonstone, and similarly common crystals. The Conclave predates the Loar War, and was considered ancient even before the lost Age of Splendors. So far, no scholars have settled on a theory for its creation. The favorite guesses are that it represents the final stroke of a conflict between the Cannoan Pantheon and some now-forgotten gods, or that it's a leftover from some incomprehensible seismic event during Canno's earliest days.
Wherever the Conclave comes from, it's located roughly in the center of Anseth, and all the continent's peoples use it for a meeting place. Fissures throughout the Conclave vent hot fog to the skies, which has filled over the ages with powderized crystals. A huge breed of airborne reptile, the Mokkasha, have developed air-bladders and cuttlefish-like fins they use to surf this fog. Despite their size, the Mokkasha weigh relatively little, and only produce enough lift to carry two or three average humans. They're quite happy to do this, however, since food is normally scarce in the Conclave and humans always seem to have extra lying around.
Aside from the Mokkasha, the Conclave has a number of plants which thrive in the mineral-rich freshwater crevices and canyons at the crystal-formations' bases, and an impressively health insect population on which the Mokkasha feed when they can't beg red meat from obliging humans. The Conclave Wardens live at wide points in these crevices, and venture out to maintain the more significant or beautiful ruins.
And then, as is always the case with my writing, there's the creepy thing: the Vine Sea.
The Vine Sea has exactly one commonality with the Conclave, which is that no one has any idea where it came from. Otherwise, it's a mass of "vines" thicker than all but the largest trees, dozens or hundreds of feet deep and coiling endlessly. The Sea blocks most of Tresamer's Southern border, forcing ground-bound visitors to negotiate dense coniferous forests to the Northeast or journey far around the Vines to the Southwest if they don't want to travel through the Gouges. You could try to cross over the Vines directly, but unless you were a mage that wouldn't be wise. The sheer mass of the Vines and the tautness of their coils means they effortlessly crush any smaller matter caught between them. A single misstep is all it takes.
Making matters worse, the vines often become caught on each other and strain until bursting like enormous chlorophyllic cables. Over the years, they've developed a "skin" of detritus, goods, weapons, armor, trinkets, and ample corpses from those who somehow or other ran afoul of them. The dregs of Tresar society often wind up as Vine-Skimmers, running for hours back and forth across the Vines to snag the few choice relics they find. Otherwise, no one really benefits from the Vines. The Tresar's Wise Women of the Hearths, who don't get out much and aren't always proactive about responding to new research, have declared the Vines a gift from the Tresar's ancestors and forbidden any attempt to clear them.
Thieves, brigands, pirates and ne'er-do-wells--most worlds have them! What distinguishes your world's renegades, or if you don't have them, is there a story behind that? If not, what's the closest to a conventional blackguard?
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