As the southern entrance to Expo ’98, Porta do Mar embodies a dual ambition: to serve as a symbolic gateway to the new urban district while preserving the industrial memory of the site’s past. Central to this approach is the retention of the former Petrogal cracking tower, an imposing industrial structure that now stands as a monument to the transformation of the area.

A striking feature of the design is the pedestrian bridge, made of opaline glass, which radiates fluorescent white light at night. More than a practical crossing, it is a luminous arch, reinforcing the notion of threshold and passage—both into the Expo site and into a new era for Lisbon’s riverfront.

This composition of past and present, of industrial heritage and contemporary intervention, mirrors the larger vision for Parque das Nações: a district where the ruins of an old industrial zone are not erased but reinterpreted through dynamic, forward-thinking architecture. Porta do Mar stands as both a gateway and a foundation, framing the tower in a way that redefines it for a new urban identity.

The Pavilion of Knowledge, designed by João Luís Carrilho da Graça, is a remarkable architectural landmark in Lisbon, originally conceived as the Knowledge of the Seas Pavilion for the 1998 World Exhibition. This structure serves as a tranquil retreat amidst the vibrant Expo environment, offering a space for reflection and exploration. The building is characterized by its two distinct volumes: a vertical section that was initially intended to house ships and a horizontal expanse dedicated to various rooms and services. The horizontal volume is uniquely suspended, facilitating a seamless connection between the walkway and the dock, and features a large access courtyard. Visitors are drawn into the pavilion through a spiral ramp that leads to the interior spaces, designed as “empty stages” for dynamic interactions. Constructed from white concrete, the pavilion showcases innovation in its material use, emphasizing aesthetic purity and minimalism. As it transitioned into the Pavilion of Knowledge-Living Science Centre, the building maintained its architectural essence while evolving into a center for scientific and technological discovery. Carrilho da Graça’s vision of fostering curiosity and learning is evident in the pavilion’s thoughtful design, which continues to captivate and engage its visitors.

The Utopia Pavilion, a striking architectural marvel from EXPO ’98, stands as a testament to innovative design and multifunctionality. Originally hosting a multimedia spectacle, it now serves as a venue for sporting events and large-scale concerts. Situated on a vast esplanade between the Olivais Dock and the Tagus River, the pavilion’s strategic location enhances its monumental presence. Its design, featuring rounded forms reminiscent of a beret, is complemented by a grand staircase that invites visitors to ascend into its interior. The pavilion’s roof, supported by laminated wooden arches spanning 114 meters, evokes the spirit of the Portuguese Discoveries, drawing visual parallels to the frames of historic ships. However, its contemporary design aligns more with modern aerodynamic vehicles than with the heavy vessels of the past. The pavilion’s orientation towards the main avenue underscores its connection to the urban landscape, while its innovative use of space and technology reflects the imaginative spirit of the Oceans and Utopias theme. This architectural gem not only embodies the dreams and aspirations of humanity but also serves as a dynamic space for cultural and sporting events, making it a true icon of modern architecture.

The Vodafone Head Office in Lisbon, designed by Alexandre Burmester and José Carlos Gonçalves, stands as a testament to modern architectural innovation within the Parque das Nações. Completed between 1999 and 2002, this building emerged from a rare private architecture competition in Portugal, emphasizing the need for an emblematic design. The structure features a prominent stone-coated façade with a singular opening on Avenida D. João II, revealing ramps that dynamically connect the building’s floors. The façades facing the side streets display a dramatic descent towards the river, enhanced by decorative parallelepipeds and mobile window shutters. Integrating seamlessly with the scale of Alameda dos Oceanos, the east side of the building includes a brand shop behind a stately portico. At its heart, a rooftop garden crowns the base floor, which houses a parking area accessible via a road dividing the two blocks of the headquarters. The use of aluminum, glass, and wood throughout the building not only softens its scale but also creates a unique architectural language, while strategic openings and lighting controls ensure a pleasant working environment with stunning views.