London is among the world's most visited cities, with countless attractions and a history stretching back two millennia. Visitors will discover historic iconic structures like Westminster Abbey, Big Ben, and Tower Bridge, as well as recent marvels such as London Eye, a giant observation wheel that offers breathtaking views of the whole city.

Tomar sits on the Nabão River in central Portugal as a place where medieval history and everyday life meet in welcoming streets and grand monuments. Just outside the convent walls lies the Pegões Aqueduct, an impressive feat of engineering more than 6 kilometers long that once carried water from distant springs to the hilltop site. Some sections of its arches rise more than 30 meters above the valley floor, making it a striking backdrop for photos.

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.

Potsdam, the capital of Germany’s Brandenburg state, lies just southwest of Berlin and is best known for its grand palaces, landscaped gardens, and role as a seat of Prussian royalty.

Samarkand is one of Central Asia’s most storied cities, famed for its role as a crossroads of culture, science, and trade along the Silk Road. The heart of the city is the Registan, a grand square framed by three ornate madrasas decorated with vivid mosaics, intricate tilework, and soaring arches.