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

Tonga is distinctly different to its neighboring island nations. This Polynesian kingdom, made up of 170 islands, carries a proud history that dates back over 3,000 years. On the main island of Tongatapu, travelers can explore ancient stone structures like the Haʻamonga ʻa Maui Trilithon—sometimes called the Stonehenge of the Pacific. Royal tombs in Lapaha offer a glimpse into the lineage of Tonga’s kings, while village life remains guided by customs that have changed little over centuries.

Las Palmas (officially Las Palmas de Gran Canaria) is the capital of Gran Canaria island as well as co-capital (along with Santa Cruz de Tenerife) of the Canary Islands. It is a major cruise-ship port known for duty-free shopping and sandy beaches, including Playa de Las Canteras, considered by many to be one of the best urban beaches worldwide.

Trier, Germany’s oldest city, is a living museum nestled in the Moselle Valley, where Roman ruins rise beside medieval churches and bustling market squares. Founded by the Romans in 16 BCE, Trier was once known as “Roma Secunda,” the second Rome, and still boasts the largest collection of Roman architecture north of the Alps. The Trier Cathedral (Dom St. Peter), which is a UNESCO World Heritage Site, is the oldest church in Germany and houses a relic said to be the Holy Robe of Christ.

St. Martin is a unique Caribbean island that blends two distinct cultures within a single destination. The northern side, Saint-Martin, is an overseas collectivity of France, while the southern side, Sint Maarten, is part of the Kingdom of the Netherlands.