Viscri is a small village in Brașov County, Transylvania that feels like a place untouched by time, where centuries-old traditions remain alive in everyday life. Best known for its Saxon fortified church, the church of Viscri is one of the oldest and most impressive buildings in Transylvania, built of white-green limestone and strengthened with two rings of defensive walls added over the 16th and 18th centuries.

Zacatecas, built into the slopes of a narrow ravine in north-central Mexico, is a city with a deep mining past and a striking skyline. The historic center, a UNESCO World Heritage Site, is known for its pink cantera stone buildings, narrow alleys, and impressive baroque facades. The Cathedral Basilica of Zacatecas, completed in 1752, stands as one of the most detailed examples of Mexican baroque architecture, with hundreds of carved figures covering its sandstone exterior.

Croatia, a gem of the Adriatic coast, invites travelers to explore its stunning landscapes and rich history. The capital city, Zagreb, is a vibrant blend of medieval charm and modern sophistication. Wander through the Upper Town (Gornji Grad), where cobblestone streets lead you to the historic Stone Gate and the majestic Zagreb Cathedral. For a taste of local culture, visit Dolac Market, where fresh produce and traditional Croatian delicacies create a lively atmosphere source.

Ljubljana, Slovenia's charming capital, offers a delightful blend of historical allure and modern vibrancy. Nestled along the Ljubljanica River, this picturesque city invites visitors to explore its well-preserved medieval architecture and vibrant cultural scene. At the heart of Ljubljana is the iconic Ljubljana Castle, perched on a hilltop with stunning panoramic views of the city.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.