The Iron Gates, a dramatic gorge along the Danube River, is a spectacular natural wonder straddling the border between Romania and Serbia. This striking geological formation carves its way through the Carpathian Mountains, creating breathtaking views that captivate all who visit.

Oman is an independent state extending along the southeastern coast of the Arabian Peninsula. Oman falls naturally into three physical divisions: a narrow coastal plain, ranges of mountains and hills, and an interior plateau.

This southwestern U.S. state is best known for the Grand Canyon, which is a must-see. Other attractions include Tuscon's Saguaro National Park, golf courses in Phoenix, as well as Sedona's Cathedral Rock.

Philippines is a republic in the western Pacific Ocean, made up of the Philippine Islands and forming in physical geography a part of the Malay Archipelago. Eleven islands contain most of the population: Luzon, Mindanao, Samar, Negros, Palawan, Panay, Mindoro, Leyte, Cebu, Bohol, and Masbate.

Ottawa, the charming capital of Canada, offers a unique blend of history, culture, and modernity. Nestled along the scenic Ottawa River, the city is home to the iconic Parliament Hill, where the Gothic Revival architecture of the Parliament Buildings stands majestically above the riverbanks. Visitors can witness the ceremonial Changing of the Guard in the summer or explore the Peace Tower for panoramic views of the city.