What is at the top of a skyscraper?

At the top of a skyscraper, you typically find features such as a mechanical penthouse that houses elevators, HVAC systems, and other equipment. Many skyscrapers also have observation decks or rooftop gardens that offer panoramic views of the surrounding area. Additionally, some may have antennas or spires for communication purposes. The design and purpose can vary significantly depending on the building's function and architectural style.