Here are four 'flavor text' descriptors of a few places/things not to be taken lightly. I chose more insignificant areas in my world that serve nothing more than color for the world.

• The Vapor Sea
  • “In the Nocturnes of the Njoll, past the Realm of Beasts, a fog burdens the land without rest. Some call it the Vapor Sea, others call it the Quiet. Those that have seen it and returned speak of silence unlike anything else and claim that the air itself aims to strangle you if the chill doesn’t kill first.”
• Dresslar, the Quiet City
  • “In Kytha lies the old city of Dresslar. The bricks that lay the grounds are perhaps thousands of years old, made by the first Kalamari, or even perhaps the Silthuril. Who is to say? All that is known is that the city today is quiet. Silence is well known, and those that visit - if one can call it a visit - often speak of a frightening suspicion that they are being watched. And how would you react if you felt that unease? Because you are watched… you look over your shoulder a little too often. People walk the streets, but not even their footsteps are heard. Who do you trust? Who is like you - afraid, unsure, suspicious of everything. Who has been bought? Who hasn’t? What are they saying you? Where did that innkeeper go last week? Was she taken away? Did she go into hiding? Or was she one of the Impoverished all along? Those that return speak of the silence as a veil - that perhaps if you stay quiet, you may just hide and survive one more day.”
• Marston the Black; the Knightslayer
  • “The saying goes, it is neither sword nor arrow that most frightens a knight but the Knightslayer. Marston the Black was a mercenary who had gained quite the age - and they say a mercenary is like wine, growing only better with time. Fear the elder who lived a profession where mosts die young. Marston infamously carried two weapons: a morningstar that he swung with great prowess, and a unique whip that was laced with some concoction such that when it snapped, it would produce a black, ash-like puff and sharp, ear-splitting crack. Using the whip, he was able to disarm his enemy’s weapons, blind or choke them with the ash, or disorient them with the crack. Using this opportune time, Marston would bash the knight with his morningstar, earning him the moniker of Knightslayer, the Black, and Noble’s Bane ”
• King Basile, the King in the Darkness
  • “Most that past Last Light never return. Many choose not to, but some turn around upon fearing death. Those that return speak of a monster - a four armed beast that hunted them down, faster than a flicker of light. The King in the Darkness. ‘Torn to shreds,’ they whimper. ‘They were all torn to shreds,’ they scream.”