Belém Tower is one of the most popular world cultural heritages. It is also one of the oldest buildings in Portugal. This tower is not only a witness to Portugal's once glorious historical sites, but its unique architectural style and its particular location have brought it popularity around the world. It is a scenic spot for most tourists in Lisbon. Historically used as a customs, telegraph station, or even as a lighthouse, it has also been converted into a dungeon using a storage room like a prison. In the era of great navigation, it was also the starting point for navigators. It has now been turned into a museum, and the first floor has the cannons and turrets from the ancient time. Belém Tower looked at the bleakness of the world. Built in 1500, Belém Tower has a history of more than 500 years. Although it is called a tower, it is more like a small bunker, guarding the river bank. The entire tower is made of marble, and the bottom is originally a storage room, which was used to hold prisoners. Whenever the tide rises, the top tower looks like floating on the river, floating indefinitely, as if it is a beautiful fairyland. A lot of tourists come here to take a photo with Belem Tower. If you come to Lisbon, Portugal, do remember to visit this place.