Sunshine, cars, celebrities... these are just a few of the things that define Los Angeles. But as any visitor to this expansive Southern California city will tell you, it's a place with seemingly infinite possibilities. There's downtown, with Crypto.com Arena, Walt Disney Concert Hall, and Olvera Street. There's Hollywood, with its Walk of Fame, maps to the stars' homes and palm-tree lined boulevards. There's Santa Monica, with its pier, shopping and ocean breezes.

Syracuse, located on the eastern coast of Sicily, is a city where history and the sea converge in unforgettable ways. Founded by ancient Greeks in the 8th century BC, it became one of the most powerful city-states of its time. Today, visitors can explore the impressive archaeological park of Neapolis, which features a vast Greek theatre, Roman amphitheater, and the Ear of Dionysius, a limestone cave known for its remarkable acoustics.

Namche Bazaar, perched at 3,440 meters in the Khumbu region of Nepal, is often called the gateway to Everest, but it’s far more than a rest stop on the way to Base Camp. Once a trading post between Tibetan and Nepali merchants, Namche has developed into a small mountain town where yak caravans and Wi-Fi cafes exist side by side. Despite its remote location, it has a Saturday market that continues to bring traders and trekkers together, just as it did centuries ago.

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.

Amsterdam, the 17th century capital of Holland, is often called the "Venice of the North" due to its numerous, boat-navigable canals. Truly rich in history, the oldest part of this populous, multicultural city is Sloten, which dates all the way back to the 9th century.