Arjun Malaviya is an overachiever and a planner. So, when he told his parents that he wanted to save up for a solo gap year to travel the world, they weren't all that surprised.

Now, at 19 years old, he's got five completely full passports and a slew of remarkable life experiences under his belt. Malaviya told NPR that he's the youngest solo traveler to visit 100 countries.

"I was 17 years and 228 days old when I reached my 100th country," he said, adding that he celebrated the milestone in Nadi, Fiji, by visiting the colorful Sri Siva Subramaniya, one of the largest Hindu temples in the Southern Hemisphere. Another superlative: Malaviya said, based on his research, he's also "the youngest person to visit every country in Oceania." (NPR has not independently verified these claims.)

Arju

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