The 27-year-old adventurer has already travelled to 181 countries, since setting off in July 2015 and has just 15 left to go.
If she completes her epic two-year trip, Cassandra will became the first documented female to see every country.
Her amazing journey is called Expedition196 and she’s traveling as an ambassador for peace on behalf of the International Institute for Peace Through Tourism.
So far the trip would have cost almost $200,000 (around £15,8607), but the whole thing has been covered by sponsors.
The hot blonde has been documenting her journey on social media and uses her Instagram as a platform for advertising in exchange for free accommodation.