The Irish Republic's second largest city is a surprisingly appealing place - you'll find time passes effortlessly during the day, and by night the pub scene is lively. The town center is uniquely situated on an island between two channels of the Lee River.

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.

Norfolk Island may be small but it carries a story that spans centuries. Located in the South Pacific between Australia, New Zealand, and New Caledonia, the island is a fascinating blend of Polynesian roots, British convict history, and Pitcairn Island culture. Today, visitors can walk through one of the best-preserved penal settlements in the world at Kingston, where stone ruins and restored Georgian buildings stand against a backdrop of green hills and the open sea.

Hot Springs, Arkansas has been drawing visitors for centuries, and it all starts with the water. The city sits atop a natural thermal spring system that produces nearly a million gallons of 143-degree water each day. These springs gave rise to Bathhouse Row, a stretch of eight historic bathhouses within Hot Springs National Park. Some, like the Fordyce Bathhouse, now serve as museums, while others still offer traditional thermal soaks.

Inyeug, more commonly known as Mystery Island, is a tiny, uninhabited islet off the coast of Aneityum in Vanuatu’s southernmost province. Measuring just 1.5 kilometers long, the island is completely free of roads, shops, and electricity. What it offers instead is pure seclusion and untouched beauty. Cruise ships often anchor offshore, bringing day visitors to its white-sand beaches and shallow coral lagoons, but once they depart, the island returns to stillness.