TripAdvisor introduced downloadable travel guides for the top 25 summer destinations worldwide, according to TripAdvisor.com.

The guides feature the best travel advice and insider tips from TripAdvisor's 20 million monthly visitors and offer personal insights on where to eat, sleep and play for every type of traveller. The summer guides are free, fresh, and provide easily digestible travel tidbits in a portable, quick-reference format.

In addition to suggesting the best hotels, restaurants and attractions, the guides feature recommendations on what to pack, how to get around, and where to find the best views. Information for the guides was compiled from the very best of TripAdvisor content, including new site tools such as the travel wiki TripAdvisor Inside, and goLists, featuring top lists on everything related to travel. All 25 summer travel guides, downloadable in PDF file format, can be found at www.tripadvisor.co.uk/triptips.

TripAdvisor also announced today that it now features more than five million reviews and opinions on its site, up from the two million mark, just one year ago.

"TripAdvisor is taking our fresh and unique online travel advice and information and delivering it to our travellers in a brand new way," said Christine Petersen, senior vice president of marketing at TripAdvisor. "People don't always have the opportunity to bring their laptops on their summer vacations but the downloadable summer guides will allow travellers to take TripAdvisor on the road with them."

Top 25 Summer Destinations According to TripAdvisor:

1. Las Vegas
2. London
3. Orlando
4. Paris
5. San Francisco
6. Chicago
7. New York City
8. Rome
9. Washington D.C.
10. Boston
11. Dominican Republic
12. San Diego
13. Cape Cod & Islands
14. Vancouver
15. Sydney
16. Hong Kong
17. Philadelphia
18. Dublin
19. Miami
20. Playa del Carmen
21. Amalfi Coast
22. Maui
23. Cabo San Lucus
24. Charleston
25. Phuket