The more recent development of the adjacent Rowes Wharf/Boston Harbor Hotel, a landmark development of significant architectural and aesthetic significance to the city's skyline, as well as the expansion of the New England Aquarium, have made the twin towers even more desirable. The completion of the Central Artery Project (The Big Dig), with its expansive necklace of greenspace, the Rose Kennedy Greenway, gardens, and public space, has made these now historic apartment buildings central characters in the most costly urban improvement project in US history at the time.