Shown on the map above are each of the major Houses of Euolde'lloth, labeled by name. In addition, there are a few other important locations to mention:The Academy
The most obvious structures in Euolde'lloth, situated on a large rise next to the river, are the three colleges of Euolde'lloth; The spider-shaped Arach-Tinilith, the school of priestesses, the tall tower of Sorcere, school of magi, and the large pyramid of Melee-Magthere, the fighter school. All drow nobles, along with the wealthier commoners or those sent by the Houses they serve, attend one of these schools. In addition, the Academy provides the patrols that serve as the enforcement of law and order in Euolde'lloth. When a House is caught in the act of attacking another, the Academy will be joined by the other Houses of the city in striking down the guilty. In addition, to serve as a Master of Mistress of any school is a great honour, with much power behind the position.The Arena
Just north of the Academy is a large, circular structure; the Arena. Here, gladiators engage in battles with each other or fantastic beasts, sometimes to the death. Slave fodder are also often used here as challengers to drow warriors, as well as many times when two nobles have challenged each other to matches as a means of settling a feud without (publicly) involving their Houses in the matter.Gate Town
Just inside of the only cavern leading into Euolde'lloth lies Gate Town, which serves as the centre of trade and craftsmanship for the drow city. It's also the only place that non-drow are allowed to travel with escort and permission from one of the noble Houses, and many non-drow traders, mostly duergar (grey dwarves), can be found here offering their wares to the wealthy dark elves.The Main City
Centred around the Arena lie the homes of the majority of the commoners in the drow city, as well as the taverns, brothels, and minor guilds for mercenaries and assassins.Lake Niarnen
From Lake Niarnen comes the majority of the water of Euolde'lloth, save private wells filled by either underground springs or spellcasters, as well as the river that carved the entrance into the massive cavern of the city.
While the precise architecture of a particular drow House will vary, they all have a number of traits in common. They're formed from large, solid stone stalagmites or stalactites, the greatest surrounded by massive fences of enchanted metals. The elegantly-carved structures are often coated in magnificent displays of light and colour formed from magical faerie fire, making them wondrous sights to behold. However, each will also invariably possess an array of defenses, some magical and some less so. A common one is found in the form of shriekers, large mushrooms that unleash keening wails when approached, providing an alarm system against unwary attackers. However, there are many more forms, including summoned monsters, magical constructs, and any number of other options.