Spain is indeed a crossroads of sorts, for its control (at least in parts of the nation) was passed between Christians and Muslims for centuries. Both of these influences are evident in Spanish garden design.
Islamic design is especially noticeable in the clean lines and geometric patterns of Spanish gardens. Many of them have four plots to represent the gardens of paradise, and they often contain fountains to symbolize the eternal spring. Hedges, long walkways, strictly ordered paths, mosaics and patterned decorations, and bright colors are also features incorporated into the Islamic design.
Christians recognized the beauty of these gardens and incorporated many Islamic design elements, but Christianity added other design elements as well, including statues of religious figures, topiaries, and shady nooks for quiet meditation. After the exploration of the New World began, Spanish explorers brought back many new plants that were blended into Spanish gardens.
In any case, Spanish gardens help to create a seamless blend of indoor and outdoor living, and they are often walled for privacy and combine flowers, fruit, and foliage for a spot that is both beautiful and practical.