Union Hotel Karaköy sits in Istanbul's historic Galata district, just 1,3mi from the city center. Address: No. 70, Tersane Cad., Arap Cami Mah., Galata, Karakoy, Beyoglu, Istanbul, Turkey. The location places travelers in the heart of Karaköy and Beyoğlu, where old-world charm meets a lively modern vibe.

Inside, rooms feature soundproofing, air conditioning, and a private entrance, plus a landmark view. Free Wifi and a streaming service (like Netflix) keep entertainment handy, while free toiletries add a small touch of convenience. A 24-hour front desk, tour desk, non-smoking rooms, and elevator access to upper floors add practical comfort, and shuttle service plus airport shuttle are available for an extra charge.

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Room options span a range from the Standard Room and Superior Double Room to the larger Annex Junior Suites. The Annex Junior Suite family includes a Sea View variant and a Partial Sea View variant, each at 377 square feet and featuring a sofa bed plus a Queen-size bed, with a further Partial Sea View option offering a Queen bed and sofa bed. Standard Room and Superior Double Room are 269 square feet and accommodate two adults (with one child in some configurations), while a Superior River View option adds another scenic choice to the lineup. Other listings include Economy and a Room Selected At Check In option, with details varying by room.

Across the board, rooms share thoughtful touches like soundproofing, air conditioning, and a private entrance, plus a landmark view in many layouts. The Annex Junior Suite variants come in different views—Sea View, Partial Sea View, and partially View options—each offering a comfortable blend of space and modern amenities, with bed configurations tailored to the room type: some include a sofa bed alongside a Queen-size bed, while others list a Queen bed as the primary option. City and water views alike provide a memorable backdrop for relaxation after a day of exploring.

For handy planning, a range of payment options is available, including cash and major cards such as Mastercard, Visa, Maestro, and Bankcard. Shuttle services, including an airport shuttle, are offered for a surcharge. Practical extras include a 24-hour front desk, a tour desk, non-smoking rooms, and elevator access to upper floors, ensuring a smooth stay from arrival to departure.