Niagara Falls, New York, is home to one of the most powerful natural spectacles in North America. More than 3,000 tons of water pour over the edge every second, creating a thunderous roar and a rising mist that can be felt from blocks away. Visitors can stand just feet from the American Falls at Prospect Point or take the iconic Maid of the Mist boat tour, which has operated since 1846 and now features all-electric vessels.

Cardigan sits on the west coast of Wales, where the River Teifi reaches the wide sweep of Cardigan Bay. At the heart of town stands Cardigan Castle, where battlements and gardens overlook the Teifi. The castle’s history includes the first recorded National Eisteddfod in Wales, a cultural competition of music, poetry and performance that still inspires events across the country.

Collioure, just before the Spanish border, aims its charms at its own people. It's the ideal small town-without-the-glitz antidote to condo city Riviera. Like an ice cream shop, Collioure offers 31 flavors of pastel houses and six petite scooped-out beach-sprinkled lightly with beachgoers.

This city in the Rhine Gorge is known for its winemaking, dramatic landscapes and 15-minute cable car ride to the Niederwald Monument (celebrating the German victory over France in 1871).

Dunedin is the second largest city in New Zealand and home to the world's only mainland-breeding albatross colony, the Royal Albatross Centre.