Four Seasons Hotel One Dalton Street, Boston

An all-glass residential tower rising above the Back Bay, Four Seasons One Dalton occupies floors 5 through 20 of Boston's tallest residential skyscraper, giving city-view rooms unobstructed sightlines over the Charles River and the Prudential complex next door.

The spa runs a full treatment menu — body wraps, light therapy, couples' massage, and a steam room — alongside an indoor pool. Avery Bar on the ground floor draws a local crowd separate from the hotel's restaurant, an unusual split for a property of this scale.

One Dalton places guests at the convergence of Boylston Street retail, the Hynes Convention Center, and the Fenway neighborhood, with the Prudential T stop less than three minutes on foot.