Yes, your shed does need a base. This is to give it a solid, level foundation. Open soil will not help with the longevity of the shed itself or the contents within. The best materials to use to make your shed base are concrete, natural stone or wood.
Boscastle
Boscastle is a village and fishing port on the north coastline of Cornwall, England, UK, in the civil parish of Forrabury and also Minster (where the 2011 Census population was consisted of). It is 14 miles (23 kilometres) south of Bude and also 5 miles (8 km) northeast of Tintagel. The harbour is an all-natural inlet shielded by 2 stone harbour wall surfaces integrated in 1584 by Sir Richard Grenville and also is the only substantial harbour for 20 miles (32 km) along the shore. The town prolongs up the valleys of the River Valency as well as River Jordan. Heavy rainfall on 16 August 2004 caused substantial damages to the town. Boscastle exists within the Cornwall Area of Outstanding Natural Beauty (AONB). The South West Coast Path travels through the village. The town, with its attractive harbour, is a prominent tourist destination. Among the destinations are the Museum of Witchcraft, Uncle Paul's Emporium, the Boscastle pottery shop, and access to the South West Coast Path. Much of the land in and around Boscastle is had by the National Trust, consisting of both sides of the harbour, Forrabury Stitches, high over the Boscastle and also separated into old "stitchmeal" cultivation stories, as well as huge areas of the Valency Valley, known for its links to Thomas Hardy. The former harbour stables (part of the National Trust estate) are now a hostel run by YHA, preferred with pedestrians. The National Trust runs a shop at the harbour, and a visitor centre in the Old Smithy.