Your air-conditioned transportation will wind its way through Portland, along the Eastern Promenade, past some of the city's most beautiful Victorian homes, the Portland Observatory, the new Arts district, and Old Port. Then, you'll head out to some of Maine's historic lighthouses. The Portland Breakwater lighthouse is known locally as the "Bug." At 27 feet in height, it is shorter than the average lighthouse. Nearby is the Liberty Ship Memorial commemorating the ships that were constructed during World War II. Next, the Spring Point Ledge lighthouse was constructed in 1891 after many vessels ran aground on the area's dangerous rocky coast. The last lighthouse is Portland Head Light in Fort Williams. Listed on the U.S. Register of Historic Places, Portland Head Light is not only Portland's most recognizable landmark but the most photographed lighthouse in the U.S.