Brook Walk (Waterfalls) – Castle In The Clouds Conservation Area Moderately challenging, this 1.2-mile out-and-back trailleads hikers along Shannon Brook to seven scenic waterfalls within the Castle in the Clouds Conservation Area in Moultonborough. The trail follows a route that led visitors to these points more than a century ago, and includes notable falls such as Twin Falls, Whittier Falls, Bridal Veil Falls, and Falls of Song: a 40 ft plunge waterfall. Each waterfall along the path has a sign with information about it, offering historical context and interpretive details. The trail is very well-marked, and most of it runs along the water, making this a scenic and accessible waterfall hike suitable for various skill levels.