Varna is the largest city in the Eldeen Reaches and it is the primary hub of commerce that connects it to the other nations.
Merchants and shopkeeps from all across the Eldeen Reaches come to sell their wares in this city. Every dragonmarked house has an outpost here as it is such a significant economic center; it is the headquarters of House Vadalis, so they've built their largest enclave here.
Varna is located on the northern coast of Lake Galifar, and it uses the water as an additional way to ship goods in and out of the city. It's also a stop along a major roadway.