Torre de Belém
The most emblematic monument of Lisbon stands of the Tejo , where it flows into the Atlantic . Constructed in 1515 , it is a beautiful fortress that protected the city and also served as the starting point for many trips the Age of Discovery . Its historical significance and uniqueness of its architecture led to the World Heritage classification . The most striking is the facade facing the river and the views from the balconies and windows. The stone is carved with motifs related to the Discoveries , and includes an image of Our Lady of Good Success , believed to protect sailors . There's even a rhinoceros that inspired the famous engraving of Dürer. See details below.