Walk the massive schist and limestone ramparts for 360-degree views of the Maine River before heading inside to see the Apocalypse Tapestry. It is the world’s largest medieval weaving and genuinely eerie in person. Grab an audioguide to make sense of the 100-meter-long narrative—it’s more metal than you’d expect. Ninety minutes is plenty to cover the gardens and battlements. Skip the formal tours and just wander the high walls at your own pace.
