Castello Boutique Resort & Spa - Adults Only is a 5-star property in Ágios Nikólaos, Greece. The address is Epar.Od. Sisiou, Ag. Nikolaos, . It sits about 13,6mi from the city center, and the minimum price starts from $111 per night. The listing shows 124 reviews from guests.

Designed for adults, this retreat highlights a private pool, Spa/Wellness packages, and both indoor and outdoor swimming pools (free). Convenience is built in with Parking (free), Wifi (free), a Restaurant, Room service, and a Fitness center (free), along with a 24-hour front desk. Additional features include Turkish/Steam Bath (extra charges), Steam room, Spa (extra charges), Spa tub, Sauna (extra charges), Hot tub, Bar, Sun deck, Terrace, Soundproof rooms, Mountain view, Garden view, Balcony, Free toiletries, and soundproof accommodations.

Other thoughtful touches include Beach umbrellas (free) and Beach chairs/Loungers (free), Garden views, Elevator access, and Upper floors accessible by elevator. Optional extras listed are Live music/Performance (extra charges), Massage (extra charges), and Horseback riding (extra charges), with Non-smoking rooms and Air conditioning supporting a comfortable stay.

Designed for adults, this retreat pleases food lovers with two standout dining venues. Elea Restaurant pairs Modern, Romantic settings with a menu spanning Mediterranean, Local, and International cuisines. Gazebo A la Carte Restaurant offers Greek, Italian, Mediterranean, Local, International, and European options in a Modern, Romantic atmosphere. After dinner, a stylish bar provides a perfect spot for sunset sips as the evening unfolds.

Two pools are available year-round: an indoor AllSeason pool and an outdoor AllSeason pool. For guests seeking extra privacy, several room categories include a private pool, such as the Double Room, Private Pool; Deluxe, Private Pool; and Suite, Private Pool. Wellness options abound with Spa/Wellness packages and facilities including Turkish/Steam Bath (extra charges), Steam room, Spa (extra charges), Spa tub, Sauna (extra charges), Hot tub, and more.

Staying here means waking to inviting views, with options offering Mountain view, Garden view, or Sea View, complemented by balconies. Outdoor spaces include a sun deck and a terrace for al fresco moments, while non-smoking rooms and air conditioning help tailor the stay.