Küçüksu Kasrı (Küçüksu Palace)

Küçüksu Kasrı is the smallest of the three imperial Bosphorus palaces (the others being Dolmabahçe and Beylerbeyi), and the most ornate. It was built in 1856 by Sultan Abdülmecid I in a florid rococo style — a small waterfront villa with marble facades, baroque scrollwork, and a gilt interior dripping with chandeliers and trompe-l'œil ceilings. The sultans used it as a rest stop during day-long Bosphorus cruises: they'd row up from Dolmabahçe, stop for a few hours, then continue to the upper Bosphorus.

The interior is arranged around a central reception hall with a glass-domed ceiling, off which open the sultan's bedroom (with a small private bath cut from a single block of marble), the valide sultan's quarters, the writing room, and a small music room. The decorative program is over the top in the best sense — pink marble, mother-of-pearl inlay, and acres of gold leaf.

Out back, the private water gate opens directly onto the Bosphorus; you can still see the wrought-iron mooring posts where the imperial caiques tied up. Plan 45–60 minutes, and combine with a stop at Anadolu Hisarı (2 km south) for a Bosphorus-history day.