Buckingham Palace: The Queen and Prince Philip's official London residence is open to the public when the royals are on summer vacation.
Andrew Holt / Royal Collection Trust / Her Majesty Queen Elizabeth II 2017
"The global fascination with Harry and Meghan clearly has a powerful effect as this is the first time since 2016 that London has topped the world rankings," TripAdvisor spokeswoman Hayley Coleman said in a statement.
"With the couple's new Royal baby due imminently, London may continue to reap the rewards of the Harry and Meghan effect into 2020," she added.
Harry and Meghan ride in an open carriage on their wedding day.
There was also a "significant rise" in bookings for royal-focused experiences, TripAdvisor revealed, particularly for tours to see the Changing of the Guard, Buckingham Palace and Windsor Castle. Such attractions saw a year-on-year increase of between 94% and 231%, the website said.
Laura Citron, CEO of Visit London -- the capital's official visitor guide -- said the ranking were a "true validation of the incredible hard work of our tourism industry, ensuring our visitors have exceptional experiences every single day of the year."
Tourists watch the Changing of the Guard at Buckingham Palace.
Rob Stothard/Getty Images
Paris took second place in TripAdvisor's best-rated travel destinations, with Rome coming in third, followed by Crete, Bali and Phuket.
Meanwhile, 2019 was the first year New York -- which has been a long-time favorite with travelers -- slipped out of TripAdvisor's top 10 to rank as the 13th best-rated destination in the world.
Desiree Fish, TripAdvisor's Vice President of Global Communications, said the Travelers' Choice Awards "recognize major cities and islands that continue to deliver an outstanding experience and are beloved by our global community of travelers."
Here are the top 25 destinations in the world, according to the 2019 Travelers Choice Awards:
1. London, United Kingdom
2. Paris, France
3. Rome, Italy
4. Crete, Greece
5. Bali, Indonesia
6. Phuket, Thailand
7. Barcelona, Spain
8. Istanbul, Turkey
9. Marrakech, Morocco
10. Dubai, United Arab Emirates
11. Prague, Czech Republic
12. Siem Reap, Cambodia
13. New York City, New York
15. Hanoi, Vietnam
16. Tokyo, Japan
17. Playa del Carmen, Mexico
18. Lisbon, Portugal
19. Kathmandu, Nepal
20. Jaipur, India
21. Hurghada, Egypt
22. Hong Kong, China
23. Cusco, Peru
24. Sydney, Australia
25. Tel Aviv, Israel