Guy Free-Climbs the Palace of Fine Arts, Seven Story Building

Six months have passed since we witnessed the amazing derring-do of a tightrope walker who strung his high-wire along a rocky outcropping near Land's End.

But now someone has come to supplant him.

Alex Honnold, a 28 year-old rock climber who recently switched from wild escarpments to urban fixtures -- beginning with the Taipei 101 skyscraper in Taiwan -- just enthralled audiences in San Francisco by climbing the century-old Palace of Fine Arts and the brittle, seven-story 720 Building.

In a video that aired on KQED, Honnold insists he had a solid footing on both structures, and that the concrete on Palace of Fine Arts was "well-maintained." (In fact, it appears to be newly renovated, as SFCitizen pointed out this morning.)