Istanbul is a city built on layers of empire. Spanning two continents, it was once the capital of three major empires: Roman, Byzantine, and Ottoman. Visitors walking through the Sultanahmet district can witness this timeline firsthand, from the Roman-era Hippodrome to the Byzantine mosaics of Hagia Sophia, and the towering minarets of the Blue Mosque. At nearby Topkapi Palace, rooms still display the jeweled swords, ceremonial robes, and handwritten Qurans once used by Ottoman sultans.

The River Nile, most often associated with Egypt and its ancient civilizations, actually flows through eight other countries including Uganda, Ethiopia, Sudan, and Kenya. It is formed by two major tributaries, the White Nile and Blue Nile, and is considered by many to be the longest river in the world when measured from its source waters in Rwanda and Burundi.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

Punakaiki is a small coastal settlement on New Zealand’s South Island, located along the rugged West Coast within Paparoa National Park. It is widely recognized for its distinctive limestone formations and its position between dense rainforest and the Tasman Sea.

Freycinet National Park, located on the east coast of Tasmania, Australia, is a natural paradise that entices travelers with its dramatic pink granite peaks, secluded bays, and pristine beaches. The park is home to the iconic Wineglass Bay, often touted as one of the world's most beautiful beaches, with its crescent-shaped shore of soft white sand and crystal-clear turquoise waters.