A city in perpetual forward motion, Abu Dhabi greets visitors with gleaming skyscrapers and opulent Islamic architecture. There is much to see here, from the recently opened Louvre Abu Dhabi to the gigantic Sheikh Zayed Grand Mosque, with its white marble splendor. Beach life and turquoise waters can be found on Saadiyat Island, Al Bateen and Corniche Beach.

Seen from the train, Durham presents a magnificent sight, with cathedral and castle perched atop a bluff enclosed by a loop of the River Wera, and linked to the suburbs by a series of sturdy bridges.

Weissenkirchen is a charming Austrian town on the banks of the Danube. Surrounded by vineyards and wineries, Weissenkirchen is a delightful stop for European river cruises.

Mongolia, a landlocked nation between Russia and China, is defined by vast steppes, dramatic mountain ranges, and the sweeping expanse of the Gobi Desert. Known for its nomadic traditions, the country preserves a way of life that has endured for centuries.

A moving sight...literally. Hubbard Glacier's recent nickname "the galloping glacier" refers to its rapid movement through Disenchantment Bay in the direction of the Gulf of Alaska. This tidewater glacier is a natural wonder over 6 miles wide! Those on ships are usually able to get within about a half mile of Hubbard Glacier's face.