"From the Philadelphia Museum of Art (PMA) upstream, the Schuylkill River’s eastern bank has four gazebos dating back to the 1800s, originally built to capture views of the city’s impressive water system. This week Philadelphia Parks Alliance Board President Bob Thomas led an evening walking tour of the four gazebos, two of which are well known and two of which are rarely visited. The tour started at the smaller of the two gazebos behind the art museum. Today that gazebo is a recreation of a wooden version originally built in the 1870s. Though the gazebo today is made out of steel, a steel that weathers specially was used to give it a more authentic appearance."