▷ The Lowline Park in NYC While the idea of the Lowline has already existed for 10 years, it won’t be open until 2021. The timeline alone reflects the complexity of the project which is nothing less but the world’s first subterranean park. In the same way as its counterpart, the High Line, the Lowline will enrich New York City by one more unique attraction.So what is the Lowline?Photo courtesy of The LowlineThe Lowline is a green underground park that…