Walk to 18th Street, turn right and head south one block to Mount Vernon Street.

FORBES: A Walking Tour of Philly's Art Museum Neighborhood

There also are kinks in the system a sign at Charing Cross station promised a 10-minute walk to Horse Guards Parade, venue of the beach volleyball, while a sign only one block further put the time at four minutes.

WSJ: Timing an Urban Stroll Isn't a Walk in the Park