belltower of the Ružica Church today. Gondola lift In August 2017 the construction of the gondola lift, which would connect Kalemegdan with Ušće was announced by the city government for 2018. Construction was confirmed in March 2018 when the idea of a pedestrian bridge was dropped after it has been described as "complicated" and "unstable". On the Kalemegdan side, the station will be dug into the hill, 1m (3 ft 3in) below the fortress' Sava Promenade. There is a cave below the projected station, so there is a possibility that the cave will be adapted for visitations and connected to the future gondola station by an elevator. On the Ušćе side, the starting point will be next to the Skate Park, across the Ušće Tower. The entire route is long, of which will be above the Sava river itself. Estimated cost is €10 million and duration of works 18 months. Already existing criticism of the project continued, from the officially used name (gondola instead of a traditional Serbian žičara) and chosen location, to the route, especially the Kalemegdan station which is a collapsible locality above the cave, in the area already prone to mass wasting. Park of the Non-Aligned Countries in the neighborhood of Kosančićev Venac was proposed as the better solution. Cutting of 47 trees in the park, because of the gondola lift began in March 2019. The pine trees were 50 to 60 years old. With an enlarged price of €15 million and unified opposition to the project by the environmentalists, architects and urbanists, with additional cutting of over 100 trees in Ušće park across the river, this prompted popular protests. Citizens organized and as the city was cutting the trees, they were planting new seedlings. Drilling also began and it was announced that the stone wall will be partially demolished, too. Municipality of Stari Grad also organized protests, demolishing fences on the construction site, filing complaints and fines against city and government officials and announcing 24-hours watch on site and demolition of any structure built in the meantime. Construction of the gondola lift is prohibited by the current Belgrade's General Regulatory Plan from 2016 which stipulates that construction of the "cables for the alternative transportation and recreation" is forbidden in the area of the Belgrade Fortress. In March 2020, Belgrade Fortress was voted one of the Europe's 7 most endangered heritage sites by the pan-European cultural heritage