Burj Khalifa

Burj Khalifa is the tallest building ever constructed — 828 meters and 163 occupied floors — and the unmistakable centerpiece of Downtown Dubai. Completed in 2010 and designed by architect Adrian Smith at Skidmore, Owings & Merrill, it still holds a fistful of records: tallest building, tallest free-standing structure, highest occupied floor, and one of the highest outdoor observation decks in the world. Its silhouette — a stepped spiral tapering to a needle-thin spire — was inspired by the Hymenocallis desert flower and by geometric patterns from Islamic architecture.

For anyone who geeks out over how things are built, the Burj is a masterclass. Its "buttressed core" — a hexagonal central column braced by three wings — lets the tower resist Dubai's desert winds while confusing the vortexes that would make a simpler shape sway. Crews poured concrete at night to beat the heat, pumped it a record vertical distance, and used more than 100,000 tonnes of it. A carefully tuned series of setbacks steps the building inward as it rises, so the tower appears to dissolve into the sky at its peak.

Most visitors come for the view. High-speed elevators — among the fastest in the world — climb to the "At the Top" observation decks on levels 124 and 125, while the premium SKY experience on level 148 sits at 555 meters. From up there the city's grid, the man-made Palm islands, and the Arabian Gulf spread out beneath you, and on a clear evening the sunset over the desert alone is worth the ticket.

Film fans will recognize the tower as the star of the vertigo-inducing set piece in Mission: Impossible – Ghost Protocol, in which Tom Cruise scales its glass exterior with (mostly) real stunts — the sequence turned the Burj into a modern action-movie landmark. It has since become a fixture of Dubai's New Year's Eve celebrations, when the facade erupts into one of the world's largest fireworks-and-LED shows.

The tower is the heart of Downtown Dubai, a purpose-built district that also holds The Dubai Mall — one of the largest shopping centers on Earth — the Dubai Opera, and the choreographed Dubai Fountain at the tower's base, which stages a free water-and-light show set to music every evening. The building was renamed Burj Khalifa at its opening in honor of the UAE president, Sheikh Khalifa bin Zayed, after Abu Dhabi's support during the 2009 financial crisis — a small piece of history baked into the name. It took roughly six years and a peak workforce of around 12,000 people to raise it.

A few practical tips: book observation-deck tickets online in advance, because timed sunset slots sell out and walk-up prices are markedly higher. Aim for late afternoon so you catch daylight, the sunset, and the city lights on a single visit. The tower connects directly to The Dubai Mall, so it pairs naturally with a half-day of air-conditioned wandering, the mall aquarium, and the fountain show after dark.