Las Vegas

What’s happening the next few weeks:

* Designed as an Italian Renaissance palace at a cost of $1.6 billion, Las Vegas’ newest hotel, the Bellagio, above, opens its doors Oct. 15, with shops like Armani and Chanel, restaurants, dancing fountains and Cirque du Soleil’s newest show. Inspired by the concept of infinity, “O” (which premieres Oct. 17) uses water as its stage. 3600 Las Vegas Blvd. South. (702) 693-7722 for Cirque du Soleil; (702) 693-7111 for Bellagio.

* Phish will bring its always unpredictable Halloween show to the Thomas and Mack Center Oct. 30-31. 4505 Maryland Parkway. $25-$27.50. (702) 474-4000.

* The Hard Rock Hotel and Casino hosts Barenaked Ladies for Halloween, Oct. 31. $30-$35. 4475 Paradise Road. (702) 693-5000.

* At the Rio Suite Hotel & Casino, Nov. 7-April 15: “Treasures of Russia From Peterhof--Palaces of the Czars” brings a never-before-seen-outside-of-Russia collection of Romanov dynasty treasures including paintings, porcelain works, tapestries, furniture, jewelry, gowns and religious artifacts displayed in replicas of many of the rooms and galleries of Peterhof. 3700 W. Flamingo Road. (702) 889-2441 for information; (702) 474-4000 for tickets.

* At Caesars Palace Oct. 22-25, Natalie Cole. Nov. 6-8, Vince Gill. 3570 Las Vegas Blvd. South. (800) 634-6001.