The guyed towers are among the tallest man-made structures. These structures are usually very slender and their guy/mast interaction leads to highly nonlinear behaviors. Due this, simplified models are developed for simulating these structures. The discrete model of tow-degree of freedom investigated by several authors exhibits characteristic phenomena of nonlinear structures such as a superabundance of similar nonlinear normal modes and non-similar normal modes (NMNs), bifurcations of NMNs, internal resonance, and modal interaction. The present work aims to investigate the behavior of a continuous structural model of a tower with one to three guyed levels. The nonlinear finite element method (FEM) is used to parametric analyzes of the influence on static and dynamic responses, linear and nonlinear, of the geometric and materials characteristics of the guys, of the mast and guys self-weight and initial imperfections of the tower s natural frequencies and critical loads. The symmetries generated by the uniform distribution of guys have a great influence on the response, given rise to coincident critical loads and natural frequencies. This generates modal interaction in the buckling and 1:1 internal resonance, increasing the effect of the geometric nonlinearity on the response. A qualitative analysis is developed, comparing as the response of the nonlinear vibration of the continuous model as those of the two degrees of freedom model. This comparative analysis indicates the existence of the multiple NNMs and multimodes. The influence of theses modes and tower inherent symmetries are investigated through a parametric analysis of the tower under lateral harmonic excitation. tower modes. The results show that the tower exhibits a highly nonlinear response, even at low load levels, which must be considered with care in the design stage and indicates the necessary of further investigations of the nonlinear dynamic response of these structures considering the different guys distribution used in practice.