Other plant life included pine trees and ferns. The Mirage had a staff of 60 gardeners to oversee the various plant life around the property. The resort includes a nine-story domed atrium which covers an indoor tropical rainforest display. It has a combination of fake and real plant life, including orchids and 70-foot palm trees. A 40-foot Washington palm was injected with formaldehyde to preserve it, and a steel rod was inserted up its trunk to angle it over a stream in the atrium. Brinkerhoff handled the design and landscaping for the atrium, which was inspired by a project that Wynn planned in Atlantic City, before cancelling it in 1985. By 2019, the resort's tropical theme had been scaled back. Features With 3,049 rooms, the Mirage was among the world's largest hotels when it opened, surpassed by the Las Vegas Hilton (3,174) and the Rossiya Hotel in Moscow (3,200). The hotel tower, standing 29 stories, was built out in a Y-shape layout, copying the design used at the Las Vegas Hilton. The Mirage popularized the Y-shape design, which was later copied by Las Vegas' Treasure Island, Monte Carlo, and Mandalay Bay resorts. The hotel's top five floors are used for high roller rooms and penthouse suites. The exterior windows are made of 18-karat gold, and the suite floors are distinguished with uninterrupted glass panes, whereas the lower floors have white streaks between them. The white-and-gold color scheme had previously been used at the Golden Nugget. Since its opening, the hotel has featured a $1.2 million aquarium tank, built behind the check-in stand. The aquarium was conceived by Conversano to distract guests and relax them while waiting to check in. It contains hundreds of fish, and is a popular attraction. The Mirage's casino measures . It opened with 2,300 slot machines and 115 table games. A high-limit area was added at the last minute, having been overlooked prior to that point. The Mirage was the first Las Vegas casino to use security cameras full-time on all table games. In 1997, Mirage Resorts spent $150 million on artwork which was displayed in the resort's high-stakes gaming area. The casino added a new high-limit gaming area in 2004, featuring design work by artist Dale Chihuly. The Mirage also has of convention space. Other resort features have included a tattoo parlor, and a clothing store by the Kardashian family. The Mirage-Treasure Island Tram travels