This cultural capital and university city holds more than 2,000 years of history and is the cultural hub of Germany. Marvel at the gorgeous twin-spired Cologne Cathedral, known for its gilded medieval reliquary and sweeping river views, or lose yourself in one of Colonge's many museums for a few hours. Cologne boasts of having most pubs per person in Germany, so make sure you sit down for a refreshing regional Kölsch beer during your travels!

Warsaw stands as one of Europe’s most resilient cities, having rebuilt itself almost entirely after World War II. The Old Town, meticulously reconstructed using paintings by Italian artist Bernardo Bellotto, feels centuries old but is, in fact, less than a hundred years in its current form. Behind the medieval facades lie stories of uprisings, resistance, and quiet defiance. Visitors walking through Castle Square can enter the Royal Castle, where Poland’s Constitution of May 3, 1791 was adopted.

Alberobello in southern Italy’s Puglia region captures the imagination with its distinctive trulli houses. These structures were built using a dry-stone technique passed down over centuries, without mortar or cement, and their unique form comes from layer upon layer of limestone nestled from nearby fields. Alberobello’s trulli are so remarkable that in 1996 the historic center was inscribed as a UNESCO World Heritage Site, where more than 1,600 of these buildings still stand.

Madurai is a major city in the southern Indian state of Tamil Nadu, known for its long-standing role as a center of religion, trade, and learning. Set along the Vaigai River, it has grown into a busy urban area while retaining a strong connection to its temple-centered layout.

Indianapolis, known as the Crossroads of America, is more than just a hub for interstates and conventions, it’s a city where speed, sports, and creativity intersect. At the center of it all is Monument Circle, a grand civic plaza anchored by the Soldiers and Sailors Monument, which visitors can climb for panoramic views of the skyline. Just a few blocks away is the Indianapolis Motor Speedway, the largest sporting venue in the world by capacity.