Naypyidaw, located near Pyinmana, officially replaced Yangon as the capital of Myanmar in November 2005. It officially goes by the acronym of NPT.
Naypyidaw is a unique city in the region. It is a fully constructed large city but with very few inhabitants compared to its size, so you can experience the amazing and unprecedented (for Asia) experience of never ever being stuck in traffic. It is between two mountain ranges so has little to offer in the way of day trips or activities. The city was constructed to be the capital by the military and lacks the dissarray and wonder found throughout the rest of Myanmar. Naypyidaw was constructed in secret by the Myanmar Junta in the early 2000s. In November 2005 it was officially announced as the country's new capital. Government workers were given two months notice that they would have to move from Yangon, as all government offices and ministries were relocated. Embassies and international organisations like the UN have not yet relocated but are expected to at some point. The international retail chains found throughout all other capital cities are not present in Naypyidaw.