Bellagio's expansion, the property's first since its 1999 opening, did not add any casino space. Randy Morton, Bellagio's vice president of hotel operations, said the current gambling configuration of 125,000 square feet at the Bellagio was sufficient.

The Spa Tower, southwest of the resort's conservatory gardens, encompasses 819 guest rooms and 109 suites on the top seven floors, including two 4,500 square foot presidential suites that Morton said cost $5,000 a night.

Bellagio's average room rate is $250 per night, and Morton said the property was sold out this weekend and through the New Year's Eve holiday, where the average rate is $599 per night.

He estimated the Bellagio expansion would add 1,100 full-time workers and 300 part-time workers to give the resort a total of 10,000 employees.

In addition to the rooms and suites, a significant part of the expansion focused on the property's spa and salon. The resort doubled the size of the spa to 55,000 square feet, adding more workout space, a renovated reception area, and increased the number of massage and therapy rooms while upgrading the facility's offerings. The salon grew to 10,000 square feet and now has 61 stations for hair, makeup and beauty treatments.

"Some of the treatments offered at the spa are not found anywhere else on the Strip," Morton said. "A facility such as this is a source of revenue for the Bellagio and it's an aspect of the property our customers come to expect."

The new restaurant, Sensi, offers a diverse menu with tables surrounding the kitchen that doubles as a culinary theater. Shopping offered along the Spa Tower's walkway include Regali, an upscale men's store; a remodeled garden center; a Bellagio logo shop; and a newsstand. A high-end pastry shop is still under construction.

The expanded convention area gives Bellagio a total of 200,000 square feet of meeting space with three large ballrooms, sized 45,000 square feet, 35,000 square feet, and 25,000 square feet.

Increasing the convention space allows the resort to focus on gatherings of difference sizes, such as corporate meetings. Future convention bookings are up 35% overall, Morton said.

One specialty room in the new convention area is dedicated as an exhibition kitchen where celebrity chefs can entertain and offer cooking demonstrations for up to 60 guests. The room can also be rented out for group activities in association with a meeting or convention.