Located just 3 km from Dublin city centre, the National Botanic Gardens are an oasis of calm and beauty, and entry is free. A premier scientific institution, the gardens also contain the National Herbarium and several historic wrought iron glasshouses. Guided tours of the Gardens all year round: Sundays at 12.00pm & 2.30pm, admission free. Monday-Saturday 11.30am & 3.00pm, €5 pp. Pre-booked tours by arrangement. Ireland's premier garden is a green oasis situated in the leafy suburb of Glasnevin, not far from Dublin city centre. It is just under 50 acres in size and home to over 17,000 different plant species. Famous for its Victorian glasshouses: the Curvilinear Range, designed by Richard Turner, and the Great Palm House, Ireland's only tropical rainforest. Outdoor features include the rose and rock gardens, double herbaceous borders, the pond and river walks, the organic fruit and vegetable garden and wild Ireland, the native conservation.