If you're considering staying in Vegas, you will most likely hear about the iconic Bellagio hotel. Just past by the main lobby you will see the conservatory. It changes every season so you can come back whenever you visit Vegas again.
This is another attraction by Bellagio hotel. It goes off 30 min during the day and 15 min at night. It looks more magical at night in my opinion. You can see it as you walk through Las Vegas boulevard.
This property is inspired by Venice. It really feels like you're traveling through Italy. It has an indoor/outdoor canal that you can go through by renting a gondola. It is a cool activity to try especially for couples.
It is located inside the new Resorts World that has Hilton, Crockford, and Conrad. This is essentially a food court inspired by street food in Asia. It has many food options and you can place your order with the kiosk so no need to wait in line.