From the top of the Tower you can see the Tagus estuary and its banks, as well as the whole area of Belém and its monuments. With its back to the river and next to the rail on the north side of the terrace, you can see the Chapel of S. Jerónimo, which is found among the trees at the top of Av. Da Torre de Belém. It was built in 1514, on the land belonging to the Jerónimos friars. A little to the right, beyond the Cultural Center of Belém, one can admire the Jerónimos Monastery. Facing the river and on the other side of the Tagus, next to some cylindrical constructions, traces of the Torre Velha, also known as Torre de S. Sebastião, are detected. Built by D. João II and finished around 1480, this tower was part of the tripartite defense system of Barra do Tejo, crossing fire with the Belém Tower.