Colin Mill Bridge Fort

You won't find Colin Mill Bridge Fort marked on many maps, but once you know where to look - just outside Castle Douglas in Dumfries and Galloway - the Roman earthworks reveal themselves on the landscape like an old secret. What you're standing in front of are the remains of a Roman auxiliary fort, dating back nearly two thousand years. The ditches and ramparts that once protected soldiers are still visible if you know what you're looking at, though they're considerably lower and softer than when legionaries marched through here.

It's not a grand ruin with walls you can clamber over. There are no visitor facilities, no interpretive boards, no entrance fee. What makes it worthwhile is the archaeology itself - the chance to stand where Roman Britain actually was, rather than reading about it in a museum. This appeals to people who like their history raw and require a bit of detective work. Walkers and history enthusiasts will get the most from a visit. Most people allow thirty minutes to an hour, wandering the perimeter and trying to make out the fort's shape.

Getting here from Castle Douglas takes just a few minutes, making Colin Mill Bridge Fort an easy addition to a longer day out in the region. The nearby holiday parks - Kippford View, Castle Point, and Coastal Kippford are all within four or five miles - give you a base for exploring both this fort and the broader Roman archaeology of south-west Scotland. The site is accessible year-round, though autumn offers the best light for spotting the earthworks.