Heritage Open Day: Take a look inside Maidstone Carriage Museum and discover some surprising stories and fascinating facts about this wonderful collection. Come and explore Maidstone Carriage Museum and delve into the fascinating history of transport through this unique collection of horse-drawn vehicles and transport curiosities. More than 60 vehicles are on display, ranging from grand carriages such as Queen Victoria's State Landau, to antique sedan chairs and Victorian ‘growlers'.