Siem Reap, Cambodia, is No. 2 on the list, jumping seven spots from last year. TripAdvisor's award-winning destinations were selected using an algorithm that factors in the quality and quantity of user reviews and ratings for hotels, restaurants and attractions over a 12-month period.
CHRISTOPHE ARCHAMBAULT/AFP/Getty Images
3. Istanbul, Turkey —
Istanbul dropped two spots from its No. 1 ranking last year to take the No. 3 spot on the 2015 Travelers' Choice global list of top destinations.
David Cannon/Getty Images)
4. Hanoi, Vietnam —
Hanoi jumped four spots to take this year's No. 4 spot.
Rob Ball/Getty Images
5. Prague, Czech Republic —
Prague held on to its No. 5 ranking on the global list for the second consecutive year.
Sean Gallup/Getty Images
6. London, England —
London dropped three spots this year to take the No. 6 spot on the 2015 list.
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7. Rome, Italy —
Rome dropped five spots from 2014 to No. 7.
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8. Buenos Aires, Argentina —
Buenos Aires climbed six rungs to No. 8 on TripAdvisor's 2015 global list.
Diego Giudice/Bloomberg via Getty Images
9. Paris, France —
Paris dropped two spots from 2014 to No. 9 on this year's top destinations list.
FRANCOIS GUILLOT/AFP/Getty Images
10. Cape Town, South Africa —
Cape Town climbed nine rungs to round out this year's top 10.
RODGER BOSCH/AFP/Getty Images
11. New York —
New York is the top United States destination on the global list, ranking No. 11 in 2015. In addition to this global list of the world's best destinations, TripAdvisor has also compiled a series of lists of regional destination winners. New York is the top-ranked destination on the Travelers' Choice list for the U.S.
Andrew Burton/Getty Images
12. Zermatt, Switzerland —
The famous Matterhorn no doubt helped Zermatt, Switzerland break into the top 25 this year.
Tim Graham/Getty Images
13. Barcelona, Spain —
Barcelona climbed two spots to No. 13 this year.
Xavi Gomez/Cover/Getty Images
14. Cappadocia, Turkey —
Goreme in the Turkish region of Cappadocia, pictured, is a newcomer to the top 25 at No. 14.
Murat Oner Tas/Anadolu Agency/Getty Images
15. Ubud, Indonesia —
Ubud in Bali, Indonesia, is No. 15 among TripAdvisor's 2015 best global destinations.
Agung Parameswara/Getty Images
16. Cusco, Peru —
Cusco, Peru, a gateway to Machu Picchu and home to colorful traditions including this Takanakuy ritual, is this year's 16th-ranked destination.
Sebastian Castañeda/Anadolu Agency/Getty Images
17. St. Petersburg, Russia —
St. Petersburg dropped one spot to No. 17 on this year's list.
Harry Engels/Getty Images
18. Bangkok, Thailand —
Bangkok climbed two spots to No. 18 on the 2015 global list of the world's best destinations.
Nivolas Asfouri/AFP?Getty Images
19. Kathmandu, Nepal —
Kathmandu, where revelers recently celebrated the Holi festival of colors, is ranked 19th on the global list.
PRAKASH MATHEMA/AFP/Getty Images
20. Athens, Greece —
The impressive Greek city of Athens is No. 20 in 2015.
Matt Cardy/Getty Images
21. Budapest, Hungary —
Budapest retained its No. 21 rank year over year.
ATTILA KISBENEDEK/AFP/Getty Images
22. Queenstown, New Zealand —
Queenstown, New Zealand is this year's No. 22 destination. Here, a competitor in the 2013 IPC Alpine Adaptive Slalom World Cup rides up to a race start line.
Hannah Johnston/Getty Images
23. Hong Kong —
Hong Kong ranks No. 23 on TripAdvisor's 2015 Travelers' Choice list.
Brent Lewin/Bloomberg/Getty Images
24. Dubai, United Arab Emirates —
Dubai dropped from No. 17 in 2014 to No. 24 on this year's list.
KARIM SAHIB/AFP/Getty Images
25. Sydney, Australia —
Sydney rounds out the list at No. 25, dropping from No. 22 last year.