The upside down hotel said to have inspired Star Wars faces demolition | CNN
The influence of Hotel du Lac in Tunis, shaped like an upside-down pyramid with serrated edges, would later be seen in the fictional Sandcrawler vehicle used by the Jawas of the Tatooine desert planet in the film.
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Hôtel du Lac, Tunis - Wikipedia
The striking design, departing from traditional Arab and European architecture, made the hotel a symbol of modernism in Tunis. It remains an important example of Brutalism in North Africa. Its distinctive shape has prompted comparisons with the sandcrawler vehicle of the Star Wars films.
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The hotel was privatised in the 1990, but it fell into disrepair and closed in 2000. It was bought by the Libyan Arab Foreign Investment Company (LAFICO) in 2013, which proposed demolishing the building and spending up to $100m to replace it with a new five-star hotel tower. Concerns about imminent demolition were raised again in 2019.
Also this is brown, not gray, and the edges have an interesting geometry.
Personally I think brutalism works best when you integrate it into a park or other kind of large public complex.