5) Phoenix Desert Botanical Garden.
Staying in the USA for a moment, we have something a little different in a much hotter climate. This desert garden in Arizona is world-renowned for its wonderful displays of local plants and walking trails. There are 139 species of desert plants in this 140-acre plot.
While many are familiar to locals, who still flock here to relax and watch the butterflies in spring, they offer a unique experience to those visiting from other climates. The range of cacti alone is enough to make this garden a unique experience.