Phu Quoc is the next big holiday destination. Phu Quoc is a small island off the coast of Vietnam. The island is about 48 kilometers long and 10 kilometers wide at its widest point. Phu Quoc has been untouched by mass tourism, so it's still a hidden gem waiting to be explored. The weather on the island is perfect year-round - it's sunny and humid in the summer, and there's a cool breeze coming off…