In early 1978, the amusement park's Haunted Castle was completed and the opening was scheduled on 10 May that year. Bush, who just had a big hit in the Netherlands with "Wuthering Heights", made her debut on Dutch television in the special. Her popularity was used to draw the attention to the Haunted Castle. The Dutch climate and the integral role of natural greenery in the park's appearance and theme once prevented it from remaining open year-round. Efteling's operating season was once limited to April - October, but the park's management, to make the park more profitable, began experimenting with 'Winter Efteling' in 1999 (see index below for attractions closed during "Winter Efteling"). The seasonal event, which features holiday displays and Christmas lights, has grown increasingly popular in the 2000s and draws thousands of visitors annually. In 2010, Efteling announced plans to remain open year-round. From November through about February, the 'Winter Efteling' theme remains in place. However, some of the regular rides are either closed (like Wild Water Ride Piraña) or temporarily closed for maintenance (like The Flying Dutchman) during this period. Gisela Williams, a reporter for "The Wall Street Journal", wrote a review of the park in early 2014. Williams praised Efteling but criticized an attraction called Monsieur Cannibale for containing racist depictions of Africans. Her review was later mentioned in "De Telegraaf", a daily newspaper in the Netherlands, and drew several angry comments from its readership. Williams also received her first death threat for her comments about the controversial attraction. The park receives 123,456,789th guest on June 19, 2015. The trackless dark ride Symbolica opens on July 1, 2017. With a cost of €35 million, it is the most expensive attraction ever built at Efteling. The Efteling Theme Park Resort now offers the original theme park, two hotels, a theatre, a golf course, and two holiday villages. It is still owned by the Efteling Nature Park Foundation. The 30th fairy tale is inaugurated at Efteling in 2019. The success of Efteling has been attributed largely to its high-quality ride designs and architecture, in addition to its pleasant greenery and gardening. The park, under the aegis of its creative directors, has always had high standards. When Anton Pieck was asked to design the initial fairy tales for the Efteling, he made sure the park would live up to his personal high standards.