Bolívar

The town's entire character is a consequence of hydrology. While the Magdalena's navigable channel ran past it, Mompox was a transfer port on the main artery into the interior, and the wealth that passed through built the churches, the long whitewashed street frontages, the wrought-iron window grilles and a goldsmithing and silversmithing trade of real quality. When the river's course altered and the traffic moved to the far branch, the economic reason for the town evaporated within a generation. What that produced is unusual: not a ruin and not a restoration, but a working town whose fabric was never replaced because nobody ever had the money or the motive. Walking it, the thing you notice is the absence of the twentieth century.

Low, white, hot and quiet. The streets run parallel to the water with the churches spaced along them, their towers plain and heavily buttressed rather than ornate, and the houses turn broad shaded frontages to the street. Almost nobody drives; the sound in the afternoon is birds and a distant motorbike. The silverwork tradition survives in small workshops making filigree — fine wire worked into jewellery — and you can watch it being done and buy directly from the people making it, which is rare enough to be worth doing deliberately. In the evening the whole town moves outdoors along the riverfront. The one time it is not quiet is Holy Week, when the processions — slow, candlelit and famously long — draw visitors from across the country and fill every bed for a week.

The Rosario archipelago is a group of small coral islands and sandy cays an hour or so off the coast by fast boat, and it is the readiest access to living reef anywhere near this part of the Caribbean. Day trips run constantly and follow a pattern: a boat out, a couple of hours of snorkelling, lunch on an island, and back before the afternoon chop. That works, but the islands are considerably better as an overnight — the day boats leave in the late afternoon and the whole archipelago goes quiet, the water settles, and the snorkelling in the early morning is a different experience with nobody else in it. Accommodation is mostly small and low-key, several islands have no mains electricity beyond generator hours, and the reef itself is protected, so touching or standing on coral is both damaging and prohibited.

Mompox is a genuine journey rather than a hop, which is a large part of why it has stayed as it is — several hours by road from the coast, with the final approach by ferry across the river, and the routes are slow enough that arriving in daylight is worth planning for. Two nights is the right length; one is a lot of travel for a single evening, and the town's pleasure is unhurried by nature. The islands, by contrast, are easy: boats leave from the coast every morning in season and the crossing is short. Fitting both into one trip works well precisely because they ask for opposite moods — the quiet inland town first, then the water. The wider question of how Colombian regions stack together is covered on the itinerary guide.