In the northeastern part of Lower Lough Erne, just off the coast of Archdale Country Park sit a group of tiny islands. They are actually the tops of small hills, or drumlins, created during the formation of Lough Erne. The islands are a beautiful sight, especially in autumn when the rare spindle trees appear with dark red leaves and bright pink fruits, accented by the golden aspens. Garden warblers make their homes here, rare birds nesting within the dense foliage. The most common trees in the park are the oak and ash, and they stand out from the surrounding forests, which contain an abundance of conifers. These islands once had a rich agricultural potential, but are now long deserted, as evidenced by old irrigation ditches and the ruins of what were once farmhouses. Currently, some of the islands are designated as National Nature Reserves.