WASHINGTON (AP) — The Washington Monument is closing indefinitely because of ongoing problems with its elevator, the latest in a series of woes for one of the city's most enduring tourist attractions.

The National Park Service announced Monday that the monument, which draws 600,000 visitors a year, will remain closed until its elevator control system can be modernized, a process expected to take up to nine months once work begins.

A start date for the $3 million project has not been determined.

The lone elevator carrying visitors to the top of the 555-foot obelisk has broken down frequently over the past two years, roughly since the monument reopened after being damaged in an earthquake.... Read More: FOX5DC