To mark the start of the new millennium, architects David Marks and Julia Barfield devised an instant icon that allows Londoners and visitors alike to see the city from a completely new perspective. The giant Ferris wheel was the largest cantilevered observation wheel ever built at the time, and it's one of the city's tallest structures. The 25-minute slow-motion ride inside one of the enclosed passenger capsules is so smooth you'd hardly know you were suspended over the Thames. On a clear day you can see up to 25 miles, with a bird's-eye view of London's most famous landmarks as you circle 360 degrees. If you're looking for a special place to celebrate, Champagne and canapés can be arranged ahead of time. Buy your ticket online to avoid the long lines and get a 10% discount. For an extra £8.55, you can save even more time with a Fast Track flight (check in 15 minutes before your "departure"). You can buy a combination ticket for the Eye and other London attractions—check online for details—and board the London Eye River Cruise here for a 40-minute sightseeing voyage on the Thames. In December, there's a scenic ice rink just below the wheel.