Vienna Woods and Mayerling Half Day Trip. Discover the Vienna Woods on a half-day guided tour. Led by an expert guide, visit the Mayerling hunting lodge, where scandal once rocked the royal family, as well as the Cistercian Abbey of Heiligenkreuz, constructed in 1133. Soak up a scenic boat ride on the Seegrotte, the largest subterranean lake in Europe. Then, journey back to your original departure point, spotting Liechtenstein Castle on the way. Book Now and Save 10% Off Vienna Woods and Mayerling Half Day Trip.