Vibrant Bazaar Stroll
Alcazar Palace Tour
Explore Belém Tower
Visit the Louvre
Admire Michelangelo's David
Colosseum Tour
Acropolis Historic Site
Hagia Sophia Tour
Visit Burj Khalifa
Take a rickshaw ride through Old Delhi
Explore the Old Quarter
Visit the Shibuya Crossing
Walk across the Sydney Harbour Bridge
If you have more time, consider adding a visit to Amsterdam, Netherlands or Montreal, Canada for their unique culture. If you have less time, consider removing destinations such as Hanoi or Sydney to shorten the itinerary. Make sure to check the opening and closing times of attractions before visiting to avoid any disappointments or delays in your itinerary.