Morro da Igreja, the Hill of the Church, rises to 1,822 meters, making it the highest inhabited point in Santa Catarina and the second-highest summit in the state. Altitude is everything here. A weather station run by Epagri and Ciram sits at 1,810 meters, logging the brutal numbers the mountain produces. On August 21, 2020, a two-centimeter snowfall came with a low of minus 8.6 degrees and a high that never climbed past minus 1.2, one of the coldest full days the station has measured. The absolute lowest daytime maximum on record, minus 2.3 degrees, fell on July 23, 2013. These are not the temperatures of a postcard Brazil, and that contradiction is exactly why people come.

Look out from the summit and your eye snags on something strange in the cliffs: a window of empty sky punched clean through solid basalt. This is the Pedra Furada, the Drilled Stone, a rock formation roughly 13 meters tall with an opening some 6 meters across, framed like a natural portal in the mountainside. It has become the signature image of the whole region, photographed in every light, half-hidden when the clouds boil up over the escarpment and sharply outlined on the rare crystalline days. Wind and water did the carving over an immensity of time, but the effect is almost architectural, as though the mountain had built itself a doorway.

The same height that makes Morro da Igreja so cold makes it valuable to the Brazilian Air Force. On the summit stands a military installation bristling with radar and radio-relay equipment, part of CINDACTA, the integrated air-traffic-control system that watches over the skies of southern Brazil. From this frozen perch the country tracks the aircraft crossing its lower latitudes, the highland weather that torments visitors serving instead as an unobstructed vantage for the antennas. It is a fitting use for a place defined by altitude: the highest livable ground in the state, turned into a lookout over everything that flies above it.

Down in Urubici, the seasons have rewired the local economy. Across most of Brazil, winter is the off-season; here it is the main event. When the forecast threatens frost or, better yet, snow, the roads up to Morro da Igreja fill with families from warmer states who have never seen ice form on a leaf. The mountain obliges with frozen waterfalls, white meadows, and air sharp enough to fog every breath. For a country that measures its summers in heat waves, the chance to shiver beneath a stone window at nearly 1,800 meters is its own kind of luxury, and Urubici has learned to sell the cold it once simply endured.