Mamula Island, KotorMamula Island in Kotor, Montenegro has a corrected score of 3.2 ± 0.5 (thin evidence, 3 of 4 platforms), ranked 19 of 19 hotels we score in Kotor. Its platform ratings, normalised to 0-5, average 2.8 before correction: Booking.com 4.5, Tripadvisor 3.2, Google 0.8. Rooms from about $1,323 a night (cached, not a live quote).Mamula Island is a 32-room boutique hotel situated on a small, uninhabited islet at the entrance to the Bay of Kotor. The property occupies a former 1853 Austro-Hungarian circular fortress that has been converted into a luxury space featuring guest rooms, junior suites, and suites. It includes three outdoor swimming pools, a private beach, a spa, and several dining venues. The hotel suits travellers seeking seclusion and historical architecture. Because the islet is isolated, guests must arrive by boat from nearby ports such as Herceg Novi. Facilities include a gym, sauna, and massage services.What stands out

Historic fortress setting

Private beach access

Three outdoor swimming pools

Onsite spa and gym

Watch out for

Accessible only by boat

Better-scored in Kotor

Lazure Hotel & Marina, Kotor: 4.4 ± 0.2 (solid evidence, 3 of 4 platforms), from $630 a night. Lazure Hotel & Marina is a five-star boutique property situated on the Adriatic coast at the entrance to the Bay of Kotor.

Regent Porto Montenegro, Kotor: 4.3 ± 0.2 (solid evidence, 3 of 4 platforms), from $619 a night. Regent Porto Montenegro is a five-star hotel situated within the Porto Montenegro marina in Tivat.

Portonovi Resort, Kotor: 4.3 ± 0.2 (fair evidence, 3 of 4 platforms), from $340 a night. One&Only Portonovi is a five-star resort situated along Boka Bay in Herceg Novi, Montenegro.