Connected by a causeway, North Caicos and Middle Caicos combined make up by far the majority of the land mass in the Turks and Caicos with a collective area of around 100 square miles (259 square km). Before the causeway, the historical Crossing Place Trail was used by Middle Caicos islanders in the journey to North Caicos.
Although both islands are large, navigation is quite linear. From Sandy Point Marina on North Caicos (where the ferry lands), the natural progression of the main road leads through all of the main settlements on both islands and ultimately ends at Lorimers.
The entire south sides of both islands consist of low elevation wetlands and remain undeveloped. Much of this area is a protected Ramsar conservation site.
Many of the roads are surfaced and in good condition. Some roads, such as the road to distant Cedar Point on Middle Caicos, are rough tracks.