The Panteão Nacional, located in Lisbon, Portugal, is a national monument and the final resting place of some of the country's most important figures. Originally a church, it was converted into a pantheon in the early 20th century. Visitors can view tombs and memorials dedicated to politicians, writers, and cultural icons, including Amália Rodrigues and Fernando Pessoa. The impressive neoclassical building boasts a stunning dome and beautiful marble architecture, making it a must-see for tourists and history buffs alike.