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.

Fuvahmulah, part of the Maldives, stands apart as the only island in the country that is both a single atoll and a single island. Unlike the ring-shaped atolls that define most of the Maldives, Fuvahmulah has freshwater lakes, fertile soil, and lush greenery.

Langtang National Park lies just north of Kathmandu, yet it feels far removed from the city’s pace. As Nepal’s first Himalayan national park, it stretches from lush river valleys to high alpine ridges close to the Tibetan border. Snow-covered peaks such as Langtang Lirung rise above forests of oak, maple, and rhododendron, creating dramatic shifts in scenery over short distances.

Kilauea is the world's largest active volcanic mass, located southeastern Hawaii Island. The central feature of Hawaii Volcanoes National Park is an elongated dome built of lava eruptions from a central crater and from lines of craters extending along east and southwest riffs or fissures.

Theodore Roosevelt National Park, tucked into the rugged badlands of western North Dakota is where a young Theodore Roosevelt came to recover after the loss of his wife and mother in the same day. He bought a ranch, rode the open plains, and found the resolve that would later define his presidency. Today, the park named in his honor preserves that same wild spirit. Visitors can still see Roosevelt’s original Maltese Cross Cabin near the park's entrance and walk trails he once rode on horseback.