Home of Mark Twain's boyhood home, Hannibal is a quaint Missouri town located on the Mississippi River and a popular stop for river cruises.

Set in the heart of the Aegean Sea, Skyros, Greek island, stands apart from its neighboring islands with a character shaped by both rugged landscapes and quiet coastal life. As part of the Sporades group, it offers a mix of pine-covered hills in the north and drier, open terrain in the south. The main town, Skyros Town, rises along a hillside crowned by a whitewashed monastery and a medieval-style castle, creating a striking view from the harbor below.

Coursing through 10 countries, the Danube is the second-longest river in Europe. This waterway, lined with fortresses and castles, rises in Germany's Black Forest and runs for 1,770 miles to the Black Sea. The Danube is an essential commercial thoroughfare for central and southeastern Europe, and several river cruise companies sail vessels on it year-round. Destinations along this river include Vienna, Budapest, Passau and Bratislava.

Nestled at the confluence of the Stikine and Wrangell Rivers, Wrangell, Alaska, offers a unique blend of history, culture, and natural beauty. This charming city, with its rich Tlingit heritage and historic sites, is an ideal destination for those seeking an authentic Alaskan experience.

Tulum, a jewel of the Riviera Maya, is a blend of ancient history, vibrant culture, and pristine natural beauty. Perched on a cliff overlooking the turquoise Caribbean Sea, the Tulum Ruins stand as one of the last cities built and inhabited by the Maya civilization. The well-preserved El Castillo, Temple of the Frescoes, and Temple of the Descending God offer insight into the architectural prowess and spiritual life of the ancient Maya.