One of the Caribbean’s most exclusive islands offers two spectacular new villas.

Beloved by affluent travelers for it ultra-exclusivity and collection of lavish villas, the Caribbean island of Mustique now boasts two new vacation properties, the villas Sienna and Tanama.

Sienna, the latest villa built on Mustique, boasts Italian-style architecture and features two pools, five bedrooms with large marble bathrooms, a gourmet kitchen, a media room, a gym, and views of the Atlantic. A five-person staff includes a chef, a housekeeper, and a gardener.

Nestled in the Endeavour foothills of Mustique, the Oliver Messel-inspired villa Tanama, Mustique’s other new addition, is situated within easy reach of the island’s facilities: tennis courts, stables, dive shop, beaches, and bars. Tanama is outfitted with four bedrooms, a media room, a 48-foot pool with sun loungers, and a pavilion for al fresco entertaining. A large Kawasaki Mule and a jeep are also provided, making for easy exploring around the island.

In addition to its new villas, Mustique’s offerings now include new fitness options: Tennercize is a group cardio-tennis activity based on drills that give participants a rigorous workout while sharpening their skills. Meanwhile, Get Fit!, Mustique’s new personal trainer program, offers customized workouts—cardio boxing on the beach, yoga, or a hike along the 2.2-mile Fitness Trail—for guests hoping for specific results and workout solutions. To complement the program’s exercise component, a villa chef prepares meals that help participants maintain a suggested diet plan during their stay. Get Fit! is offered December through April, and in July and August. . —L.L.