Side by side The Peninsula Hong Kong vs The Peninsula Istanbul

The Peninsula opened in 1928 and still runs a fleet of Rolls-Royces for airport transfers, and that sets the tone before you've checked in: eight staff meeting the car, keys already in hand, a seat by the window to watch the harbour light show while your bags disappear. The building is the argument here — marble columns, a mezzanine orchestra, a lobby that still feels grand rather than staged. Rooms lean older in bones but not in fittings: iPad controls, a plumbed-in espresso machine, a Dyson dryer, and in at least one case a firm mattress that got a pillow-top added within minutes of a guest mentioning it.

Where it gets uneven is exactly where you'd worry about a 100-year-old building: the bathrooms. One recent stay reported visible mold and a shower head that came loose and struck the guest, with housekeeping never following through on the fix. That's not the only account of the hotel's age showing through, and a late-night arrival once got no help with bags and vague directions to a room on the opposite side of the floor. The afternoon tea has also changed — long-time regulars say the added minimum spend has turned a treat into a transaction, and more than one now goes to Rosewood or Regent instead. None of this is universal; most reports describe service that anticipates what you need before you ask, right down to a handwritten anniversary card from the Director of Front Office.

Book it for Spring Moon, the harbour-facing pool, and a lobby that still means something in a city full of newer towers. Skip it if you want a fully modernized bathroom or you're picky about afternoon tea etiquette — the newer Kowloon and Central hotels will match the polish without the history tax.

The Peninsula Istanbul sits right on the Bosphorus in Karaköy, in four buildings (three restored early-1900s originals, one new build), and what you're paying for is the view with your coffee: breakfast tables lined up along the water with the strait and the old city laid out in front of you. People who've stayed at a lot of hotels call it the best breakfast setting they've had anywhere. The rooms run large and heavily tech-controlled, tablets for lights and blinds, heated marble floors in the upgraded suites, and the arrival by the hotel's own boat (around €700, land transfer included) is genuinely memorable when the weather cooperates.

The trade-offs are real and worth pricing in. The outdoor pool isn't heated, which catches people off guard at this rate; the indoor spa pool under the domes is lovely but smaller. A new-building event space means weekend weddings can mean music until midnight for guests above it, and the restaurant experience is inconsistent: some waiters get singled out by name for excellent service, others get called slow and forgetful on the same stretch of nights. Gallada's rooftop setting gets more credit than its food. And the location, while scenic, means a walk uphill to Galata Tower and a longer trip to Sultanahmet than first-timers often expect; guests who want to be inside the old city walk out the door into it tend to land at the Four Seasons Sultanahmet instead.

None of that outweighs what's actually on offer here. This is the hotel for people who want the Bosphorus as their view, not an afterthought, and who'll use the boat, the garden, and the terrace rather than just sleep in the room. Book a Bosphorus-facing room in the Karaköy building if the view is the point, and go in knowing the pool stays cold.