The second floor of Kingdom Centre is dedicated to a Ladies' Kingdom, a private shopping mall for women that's said to have "almost everything a female would need" -- including a ladies' bank and ladies' mosque.
Men are strictly not allowed, and women can shop freely without needing to be covered.
Designed by Minnesota-based firm Ellerbe Becket, the tower also houses the Four Seasons hotel and "the world's tallest mosque" on the 77th floor in addition to offices and shopping malls.
The observation deck at the top of the tower has incredible views of the city on clear days.
Kingdom Centre, King Fahad Road, Riyadh, Saudi Arabia
Petronas Twin Towers, Kuala Lumpur, Malaysia
Height: 452 meters
Cost to build: $1.6 billion
Completion date: June 1996
Fast fact: National poet laureate A. Samad Said was commissioned to write a poem for the towers.
"These towers changed the skyline of Kuala Lumpur, and jumped the existing scale there dramatically. Petronas was also an attempt to relate a tall building to a country's culture and history, and to make a statement about its power and desire to replace Hong Kong as a financial capital." -- A. Eugene Kohn.
Employing the repetitive geometric principle of Muslim architecture and Islamic arabesques, architect César Pelli wanted the Petronas Twin Towers to exude Malaysian culture and heritage.
The world's tallest twin towers stand out in the capital's otherwise unassuming cityscape. Visitors can see the views from the Skybridge, which connects the two structures and is the world's highest two-story bridge at Level 41 and 42, as well as from the observation deck at Level 86.
Completed in 1996, the sky bridge that connects the two towers symbolizes "a gateway to the future" and Malaysia's sky-high ambition entering the millennium.
Petronas Twin Towers, Jalan Ampang, Kualala Lumpur, Malaysia
Tokyo Mode Gakuen Cocoon Tower, Tokyo
Height: 204 meters
Cost to build: N/A
Completion date: October 2008
Fast fact: It's the second-tallest educational building in the world, next to the M.V. Lomonosov State University building in Moscow.
As the name suggests, the Tokyo Mode Gakuen Cocoon Tower resembles the silky home of various larvae.
Students are educated inside the 50-level tower and metaphorically transformed into something bigger and more beautiful, culminating in generations of Tokyoites prepared to give this sprawling city, and country, focus.
According to the architects, Tange Associates, the design of the 50-level tower is meant to symbolize the nurturing of the students and transform them in order to compete in the Japanese workplace.
Tokyo Mode Gakuen Cocoon Tower, 1-7-3 Nishi-Shinjuku Shinjuku, Tokyo
Shanghai World Financial Center, Shanghai