Built to mark London’s millennium celebrations in 2000, the London Eye is Europe’s largest observation wheel. Its individual glass capsules offer the most spectacular views of the city as you embark on a circular tour rising 443 ft above the Thames. The journey lasts 30-minutes, often quicker than the time spent queuing for your turn. If you can, reserve your time in advance. The best option is to skip the line completely with a London Eye: Skip-the-Line Ticket. This advance ticket allows you to take a flight at any time on the day you plan to visit.