Sintra is a small town in Lisbon. It is very small since it is only 300 km2 in size and has no more than 1200 inhabitants. Sintra is one of the tourist destinations par excellence of the Portuguese capital.  The city became a tourist area thanks to King Ferdinand II who carried out several constructions and transformations in Sintra during the 19th century. Among these, the most important is the transformation of the Pena Palace, which became the summer residence of the Portuguese court. Below are the must-see tourist activities in this city. Pena Palace Thanks to the changes made by the king, it has become one of the most famous tourist monuments of the small city. It has also been classified as a UNESCO World Heritage Site and offers a breathtaking view as it is located on the highest hill in Sintra. The palace is impressive, both inside and outside. On the one hand, from the outside, you can see its striking colors and different architectural styles. On the other hand, inside, you can see all the furniture used by the kings in their summer residence. Castelo dos Mouros You can get there on foot from the Palace, it won't take you long.  The castle was built in the 11th century, making it one of the oldest buildings in the city and the only Muslim fortification in Sintra. Capuchin Convent Another monument not to be missed if you visit Sintra is the Convento dos Capuchos or Convent of the Capuchins. It is a very special place, located in the middle of a forest and 15 minutes by transport from the city center. The entrance fee is between 5 and 10 euros, which is quite affordable if you are looking to visit the city differently. The convent dates back to the 16th century and inside you can see how the monks lived at that time.