A favorite for many cruise-goers and tourists, Ketchikan, Alaska, is a charming city located near the state’s southeastern edge.

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.

London is among the world's most visited cities, with countless attractions and a history stretching back two millennia. Visitors will discover historic iconic structures like Westminster Abbey, Big Ben, and Tower Bridge, as well as recent marvels such as London Eye, a giant observation wheel that offers breathtaking views of the whole city.

Puerto Rico, an unincorporated territory of the United States, is a Caribbean island rich in history, culture, and natural diversity. Its capital, San Juan, is a vibrant hub where centuries-old Spanish forts, pastel-colored colonial buildings, and lively plazas tell the story of the island’s complex past.

Reshaped by volcanic activity, the rugged yet enchanting Santorini beckons all seafaring souls in the Aegean Sea. Visitors to this breathtaking and romantic Cyclades archipelago will gaze at the whitewashed cubiform houses sitting cliffside and hovering over the water.