The main square of Guardea is located in the centre of town and is named after the valiant sergeant Pietro Panfili who distinguished himself during the last World War in the battlefields of El Alamein, earning two Iron Crosses: a second class one awarded by General Keitel of the Wehrmacht and another of the first class by Field Marshal Rommel.  While Mussolini was Minister, Panfili received two silver medals for military valor from the War Department.  The dedication/naming of this square has a curious history; it is said that after the death of Pietro Panfili, which occurred in a British concentration camp in Africa, some of his friends, at night and on their own initiative, erected the commemorative plaque with his name in place of the previous one which bore the name of Prince Umberto of Savoy.

The "Arch of global consciousness" was unveiled in via del Gioco, next to the school buildings, on 19 May 2011. It is a monumental work built with materials from all around the world and it stands in a park, among green plants and grass, together with other statues created by the most popular contemporary artists. It was conceived to remind people that in the third millennium human beings have the right to live in peace  pursued through solidarity and reconciliation. On the outer pediment there is an inscription: "Insieme nel terzo millennio (together through the third millennium)", while on the inner pediment the inscription is: "Vivi in maniera che anche gli altri possano vivere" (live in a way that allows others to  live). Around the arch a series of buildings has been created, all of which have been conceived to broaden human consciousness so as to strengthen the bonds of harmony, for example the small outdoor theater (similar to Greek and Roman theaters) is used for plays which offer messages of spirituality and humanity which have been passed down through the centuries.

The fortified town of Old Guardea (Guardea Vecchia), one of the most ancient in Umbria, is situated at 572 metres above sea level and extends across  a surface of about 8,000 sqm. With its well-preserved 9th century walls (about 1/3 of the original structure  still remains), it is certainly one if the most suggestive places in this region. From the top of the hill where Guardea stands it is possible to look out over  the Tiber valley (South-West direction) and take in the view of the mountain range surrounding the Cocciano valley (North-East direction). Rich in history and charm, the landscape inspires great excursions  for lovers of nature and history. In the Middle Ages, with its mighty high walls, Guardea Vecchia was strategically one of the most important places in the Tiber valley. The toponym Guardea derives from the Greek word warda, meaning "look-out". Nowadays, after centuries of neglect, the walls of the castrum are in need of restoration in some spots but it is still possible to see the central keep and the system of eight-towers, six of which are quadrangular and two semicircular.

The Poggio Castle was built as an imperial stronghold on a pre-existent Byzantine tower, and its presence has been known since 1200 (together with the presence of Guardege and Lugnano). Formerly, its territory was wider than the current one and it included Torrone or Palazzone, property of the town of Tenaglie. Its territory which stands on the banks of the river Tiber, which at the time flowed straight from North to South, was the crossing point where Umbria met the Viterbo area. A boat carried people from the so-called Porto de Luca (below the hill where Madonna del Porto stands). Poggio was part of the Status Alviani reign, but it had, since far-off times, belonged to several feudatories: the Uffreduzzis, the Sensis, the De Nobilis, the Monaldeschis and lastly the Doria Pamphilijs. In 1495 Bartolomeo d'Alviano, who owned the fortress, withstood an attack from Todi: upon signing the peace treaty it was decided that no more rebuilding of the fortress would take place.