As of 2015, some of the top tourist attractions in the world are Machu Picchu in Peru, St. Peter's Basilica in Vatican City and the Panama Canal in Panama. Additional attractions include the Church of the Savior on Blood in St. Petersburg and the Lincoln Memorial in Washington, D.C.
Machu Picchu, a city from the old Inca Empire, lies among a tropical mountain forest in the Andes Mountains. Tourists can see about 200 ancient structures that showcase the Inca's political, religious and domestic life.
St. Peter's Basilica lies in the independent nation of Vatican City and is one of the most important locations for Roman Catholics. Among the noteworthy tourist attractions at the basilica are Michelangelo's "Pieta" and the Vatican Grottoes, the latter being a burial location for several popes. Some hold that the bones of St. Peter also lie in the grottoes.
The Panama Canal connects the Atlantic and Pacific Oceans. Visitors can view both the canal and the nearby Interoceanic Canal Museum.
The U.S. National Park Service operates the Lincoln Memorial in Washington, D.C. The memorial includes a large commemorative statue of Abraham Lincoln. The memorial is also a short distance from other attractions in the U.S. capital.