Belvedere Castle hotel on Cherry Grove (viewed from ferry boat)

With its fanciful turrets and over-the-top baronial furnishings, the Belvedere Castle (eastern end of Bayview Walk, 631-597-6448) stands out as arguably the most unusual architectural landmark on Fire Island and one of resort's most distinctive hotels. The clothing-optional, men-only hideaway is rife with ornate chandeliers, lushly landscaped decks and patios, artful fountains, and fine antiques. Rates vary greatly depending on the season and the room, but they start at a quite economical $125 on summer weekdays (and just $60 on weekdays in early or late summer). On Friday and Saturday nights, there's a two-night minimum, and rates run much higher, but this is still a pretty good deal consider the limited supply of and high demand for rooms in Cherry Grove, and the wonderfully distinctive furnishings and uber-fun vibe. Owner John Eberhardt has been an icon in Cherry Grove since he began visiting in the mid-1950s, and Belvedere Castle (viewed here from the Sayville ferry) is one of the community's great treasures.