Efres Fortress Kingdom:

The map that originated in version 1.15 initially contained only Efres Fortress, located in the mountain biome, a medieval fortress surrounded by a few houses.
Following the various updates the realm of has expanded, now there is a large city around the fortress, with a harbor and numerous buildings
Efres Fortress: X:167 Y:104 Z:-366

a new city "Suspended City" has also been added it originates as an elevated city, within the mesa biome, consisting of numerous houses, a harbor and a royal palace.
Suspended City: X: 180 Y: 80 Z:200

Later a mountaintop convent was added, very isolated and ancient, consisting of church, bell tower and monks' rooms (library, rooms, kitchens, courtyard,etc.)
Holy spirit Convent: X:718 Y:170 Z:-255

The latest addition is a city under in the desert, with a big palace, houses, prison, port etc..
Desert City: X:-393 Y:99 Z:-296

All the buildings are connected by paths, the map is very detailed and large, I recommend exploring it thoroughly. All the interiors are furnished.