Imagine climbing a steep mountain and finding three stone towers lined up along the top like three giant chess pieces. That is exactly what you see on Mount Titano. The towers are called Guaita, Cesta, and Montale, and together they make San Marino one of the most recognisable skylines in all of Europe.
From the towers you can see for a very long way - on a clear day you can spot the Adriatic Sea shimmering in the distance, and you can see right across Italy in every direction. That is because San Marino sits completely inside Italy, like a tiny island of land surrounded by another country.
Each tower is different. Guaita is the oldest and the most well-known. Cesta stands at the very highest point of the mountain. Montale is the smallest and most private of the three. A path called the 'walk of the three towers' links them all together along the mountain ridge, so visitors can stroll from one to the next.
The towers and the old town around them were added to the UNESCO World Heritage list in 2008. That means they are considered part of the shared treasure of all people on Earth - not just San Marino's own treasure.