410 West 24th Street #PHA

Penthouse A crowns London Terrace, the full-block complex that opened in 1930 as the largest apartment building in the world. Its doormen once dressed as London bobbies; its residents swam in what was billed as the city's largest private pool; and its roof, twenty-one stories up, was styled after the deck of an ocean liner.

The full-floor rental brings wraparound terraces, four exposures, a wood-burning fireplace, and Hudson views, at $24,000 a month. The complex replaced the original 1845 London Terrace, a row of Greek Revival houses by Alexander Jackson Davis on land from Clement Clarke Moore's Chelsea estate.