The Tropic of Cancer is one of the five major latitude circles that divide up our earth, and it also makes for a thrilling bucket list itinerary around the northern hemisphere.
But what does the latitude mean? According to Britannica, it's the northernmost point that the sun is directly overhead Earth, which accounts for the summer solstice on 21 June that marks the longest day of the year for that side of the planet.
ALSO WATCH: Make a road trip around the world along the Tropic of Capricorn a bucket list must
The tropic has also become an explorer's dream route - there was even a BBC show with Simon Reeve that travelled this line around the world. All the countries it travels through have some markers designating its route, some with extravagant monuments while others just have a simple road sign. But the line crosses through a dangerous area in North Africa so stick to main roads in this section.
This would be one of the most insane road trips in the world, and if you don't have the cash or time to do the whole round-the-world journey, you could always try and do segments in the big countries like India, China and Mexico.
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