Charleston is preparing to open its most beautiful homes to visitors.

The Preservation Society begins its 33rd annual Fall Tours of Homes and Gardens on Thursday. Tours are offered Thursdays through Sundays through Oct. 25 during the height of the city's fall tourist season.

The Preservation Society dates to the 1920s and is the nation's oldest community membership preservation group. Tour proceeds pay for education, advocacy and planning.

The Historic District tours feature mainly private homes and gardens but also include historic churches and public buildings.

Volunteers interpret the history, architecture and decoration of buildings for visitors.