Reference
- https://www.universetoday.com/126270/a-city-on-mars-is-musks-ultimate-goal/
- https://www.nomadicmatt.com/travel-blogs/united-states-travel-costs/
- https://www.roadtripsforfamilies.com/top-4-reasons-why-a-road-trip-is-the-best-way-to-visit-new-york-and-the-united-states/
- https://metro.co.uk/2017/02/07/9-reasons-why-phuket-in-thailand-is-not-just-a-party-island-6432007/
- https://www.royalcaribbean.com/cruise-to/phuket-thailand
- https://www.gohawaii.com/trip-planning
- https://www.royalcaribbean.com/aus/en/hawaii-cruises
- https://dealgrocer.com/dgtraveler/articles/beyond-mactan-7-other-cebu-islands-that-will-take-your-breath-away-5bab0a8b6971e0563e0000f9
- https://www.expedia.com/Cebu-Island-Hotels.d6049857.Travel-Guide-Hotels
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- https://www.britannica.com/place/San-Francisco-California
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- https://www.wired.com/story/how-los-angeles-is-helping-lead-the-fight-against-climate-change/
- https://en.wikipedia.org/wiki/Los_Angeles
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- https://en.wikipedia.org/wiki/Grand_Canyon_National_Park
- https://www.nps.gov/grca/index.htm
- http://www.phuket.com/sports/snorkeling.htm
- https://www.youtube.com/watch?v=R1TmtW33vVI
- https://www.tripadvisor.ca/ShowUserReviews-g297930-d1866109-r546957833-Bangla_Road-Patong_Kathu_Phuket.html
- https://www.ministryofvillas.com/top-5-night-markets-in-phuket/
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- https://www.tripadvisor.ca/Attraction_Review-g60982-d261241-Reviews-Hanauma_Bay_Nature_Preserve-Honolulu_Oahu_Hawaii.html
- https://www.best-of-oahu.com/hanauma-bay-oahu.html