Photo: Scott Roberto

One of the last undeveloped portions of Boston’s Rose Kennedy Greenway received a new lease on life, at least temporarily, when The Z—Boston Zipline debuted this spring. Designed to activate an under-utilized part of the linear park located between Faneuil Hall Marketplace and the North End, The Z is a new summer attraction that offers thrill-seekers the opportunity to see the city from 30 feet in the air as they careen 220 feet from the top of one platform to another, all for a mere $8 ($15 for two) from 11 a.m.–7 p.m. Sunday–Thursday and Friday & Saturday until 9 p.m.