Uruba Presidential Palace
Once a grand hotel that opened in 1910, the Uruba Palace is now the official residence of the Egyptian President. The hotel fell into disuse in the 1960s, and for a brief period, the palace was home to the Federation of Arab Republics. In the 1980s, the palace was restored and became the official residence.
The Korba area is the old center of Heliopolis, with beautiful Andalusian style architecture and lots of old churches and cultural centres from the days of cosmopolitan, multicultural Cairo.
Baron Empain Palace
Erected by Baron Empain, this utterly bizarre structure was inspired by Angkor Wat and the Hindu temples of Orissa now known as Odisha, and looks thoroughly out of place in Cairo. You can take a peek from the road, but alas, the interior has been off limits for years.
Basilica of Notre Dame
A miniature version of Istanbul's Ayasofya, dubbed the "jelly mold" by expats. Especially worth a look.
Obelisk of Senusret I
The obelisk originates from the Temple of Atum, the same complex where Cleopatra's Needle in London and the one in New York's Central Park came from. The obelisk dates back to approximately 1900 BC, providing a reminder of Heliopolis' past, as it sits in Midan al-Misallah in the midst of the modern city.