Established sometime before 2242, the Federation Caldos colony was one of the first major terraforming projects. By 2370, some of the colony's weather controls and fusion systems were nearly a century old.
This colony, located in the northern hemisphere, was intended to evoke the Scottish Highlands. The Federation installed a weather control system for controlling the planet's weather, seismic stabilizers for stabilizing the planet's geology, so that the colony did not experience earthquakes, and fusion systems for powering the colony. The weather control system last experienced a power fluctuation in 2348, and had been operating perfectly since that year.
In 2370, Beverly Crusher, chief medical officer on board the USS Enterprise-D, attended the funeral of her grandmother Felisa Howard at Caldos II, where many of the inhabitants spoke the Scots language. (TNG: "Sub Rosa")