Feel free. Visualize a spot on the map and try and imagine something that would fit into it, after that go crazy with it.
Generally here are some themes you could try and draw inspiration from, otherwise , if you can find others within yourself it is fine to use those!
1: Dark, moist, rainy. Sodden earth, thick stone walls, dense fog, and a freezing cold wind along with constant rain storms.
2: Bright, crisp, full of wonder. The world is exotic and smells of many strange scents.
3: A pure dedication to architectural marvels and mechanisms. Devices that would inspire the people of those times that may have seen them.
4: Amazing civic works, bustling cities and swooning noblemen and ladies. A large sparkling city of roses, with cheerful contented peasantry alongside gleeful, adored upperclassmen.
5: An open port with ships and stalls of all shapes, sizes and colours. Travelers from every corner of the world and fruits and spices from their homelands. A busy harbour-side of merchants, navy-men and other various deck-hands. Pennants and sails both do fly in the wind.
6: A place of natural wonders, with caves that represent images carved out by eons of flowing water. A place to explore. A place rich with adventure and reeking of the call of the wild.
Those should provide some variety but you don't have to use them
.