Open House: Exploring Inner Spaces

The streets of London are lined with architectural gems: futuristic towers, quirky homes, historic façades. But behind their doors is an inner beauty that few get to see — except for one weekend a year. On Sept. 20 and 21, London holds its annual Open House, when hundreds of the city's most exciting buildings — many usually closed to the public — invite you to step inside (www.openhouse.org.uk). Here are four places worth a peek.

PORTCULLIS HOUSE
Built to hold new offices for members of Parliament at a cost...

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