Weather can't cool boom in Ulan Bator
Mongolian capital has seen real estate prices rise eightfold since 2001 despite its harsh winters

Some city centres are defined by geographical boundaries. Others are marked by ring roads and highways.
In the Mongolian capital Ulan Bator, it is delineated by the central heating grid.

In a city where winter temperatures drop to minus 40 degrees Celsius, this network of underground pipes is a lifeline for residents trying to escape the cold.
Although expanded over time, its reach has failed to keep up with the city's growth.
Home to almost half of the country's 2.8 million people, Ulan Bator has doubled in population since 2000, putting pressure on existing infrastructure and leading to a property-market boom that is unparalleled in recent history.