Wassertum Hotel Cologne Curio Hilton, CologneWassertum Hotel Cologne Curio Hilton in Cologne, Germany has a corrected score of 3.5 ± 0.4 (thin evidence, 1 of 4 platforms), ranked 15 of 129 hotels we score in Cologne. Its platform ratings, normalised to 0-5, average 3.8 before correction: Google 3.8. Rooms from about $150 a night (cached, not a live quote).Located on Kaygasse in the Old Town, Wasserturm Hotel Cologne Curio Hilton is a five-star boutique hotel housed within a converted historic water tower. The building contains 88 rooms spread across 11 floors. Guests can access a restaurant, a spa with a sauna and solarium, and a rooftop bar. This setting suits travellers looking for unique architecture near local shops and central attractions. While the hotel offers wellness facilities and a gym, the rooftop bar is restricted to guests aged 18 and over. Some guests have reported issues with smells in the hallways and common areas.What stands out

Unique water tower architecture

On-site spa and sauna

Central Old Town location

Rooftop bar with city views

Watch out for

Odours in hallways

Rooftop bar age restrictions

Better-scored in Cologne

Atrium Apart Hotel Bruehl, Cologne: 4.0 ± 0.3 (fair evidence, 2 of 4 platforms), from $134 a night. Atrium Apart Hotel Bruehl is a smoke-free aparthotel in Bruehl, Germany, with 66 apartments ranging from 27 to 65 square metres.

Excelsior Hotel Ernst, Cologne: 3.9 ± 0.2 (solid evidence, 4 of 4 platforms), from $275 a night. The Excelsior Hotel Ernst is a five-star hotel opened in 1863 and still family-owned, standing directly opposite Cologne Cathedral on Trankgasse.

Loginn Koeln Airport, Cologne: 3.8 ± 0.4 (thin evidence, 2 of 4 platforms), from $97 a night. Loginn Koeln Airport is a 3-star hotel situated in the Porz district of Cologne.