The Palace of Parliament is the world’s second-largest administrative building (after the Pentagon) and former dictator Nicolae Ceauşescu’s most infamous creation. Started in 1984 (and still unfinished), the building has more than 3000 rooms and covers 330,000 sq metres. Entry is by guided tour only (book in advance). Entry to the palace is from B-dul Naţiunile Unite on the building's northern side (to find it, face the front of the palace from B-dul Unirii and walk around the building to the right). Bring your passport.
Several types of tours are available, including a 'standard' tour of the main rooms and hallways, and 'complete' tours that combine the standard tour with views of the terrace and basement. The standard tour takes around 45 minutes; add an extra 15 minutes to see the terrace and basement. Today the building houses the country's parliament and associated offices – though much of it stands unused.