The Sim
The Crownlands is one of the nine constituent regions of the Six Kingdoms. Instead of being ruled by a Lord Paramount, the Crownlands are ruled directly by the monarch on the Iron Throne from the city of King's Landing, the largest city in Westeros and the capital of the Six Kingdoms.
The Crownlands are located on the east coast of Westeros, on the shores of the Narrow Sea, north of the Stormlands and south of the Vale of Arryn. The Reach borders it to the southwest, and the Riverlands border it to the northwest. The Crownlands do not directly touch the lands of the Vale, as the Bay of Crabs separates them by sea, and a small strip of the eastern Riverlands separates them by land. Gods Eye lake forms the southern part of the border between the Riverlands and the Crownlands, but the northern part of the border with the Riverlands is arbitrary, not defined by geographical features.
The Crownlands consist of two major regions: the mainland area which is ruled from King's Landing itself, and the islands of Blackwater Bay, which are historically ruled from Dragonstone island by the heir to the throne.
The mainland itself is further divided into three regions. The main region lies between the Blackwater River in the south, and Crackclaw Point in the north. The Blackwater Rush, as it is known, is the major waterway of the Crownlands, flowing out of Gods Eye lake. King's Landing itself sits on the north side of the Blackwater. This area is a warm coastal plain with fertile fields that feed the capital city. Besides King's Landing itself, the major towns of Rosby and Duskendale are also located here.
Crackclaw Point itself in the north is a forested, hilly region filled with bogs and pine barrens. This backwater region is sparsely populated by local hill-lords who have been feuding with their neighbors and each other since the days of the First Men, but who submitted to the Targaryens. South of the Blackwater River, the Crownlands extend to include a narrow strip of the southern coast of Blackwater Bay, ending in Massey's Hook. This southern strip of land is sparsely populated, and dominated by the northern half of the Kingswood, a large forest which spills across the border into the Stormlands.
As befitting the region containing the capital city, many major roads link the Crownlands with the rest of Westeros. The Kingsroad extends south to Storm's End in the Stormlands, and continues north through King's Landing, passing up through the Riverlands, then to Winterfell in the North and ultimately to The Wall. The Roseroad passes from King's Landing to Highgarden in the Reach, before continuing on to Oldtown, the second largest city on the continent. The Goldroad passes from King's Landing through the Riverlands to the west to reach the city of Lannisport in the Westerlands. It is also relatively easy to reach King's Landing by ship from the two other port-cities on the east coast of Westeros, White Harbor in the North and Gulltown in the Vale of Arryn. A multitude of ships and foreign merchants from the Free Cities on the east shore of the Narrow Sea frequently visit the city for trade.