Istanbul is a city built on layers of empire. Spanning two continents, it was once the capital of three major empires: Roman, Byzantine, and Ottoman. Visitors walking through the Sultanahmet district can witness this timeline firsthand, from the Roman-era Hippodrome to the Byzantine mosaics of Hagia Sophia, and the towering minarets of the Blue Mosque. At nearby Topkapi Palace, rooms still display the jeweled swords, ceremonial robes, and handwritten Qurans once used by Ottoman sultans.

Discover this lively Westphalian center - a city where tradition and the modern age, past and present complement one another harmoniously.

Pushkar, a small town in the state of Rajasthan, India, is a unique blend of spirituality, culture, and natural beauty. Nestled around the serene Pushkar Lake, this holy town is a major pilgrimage site for Hindus, home to the rare Brahma Temple, one of the very few in the world dedicated to Lord Brahma, the creator god in Hinduism. The temple's striking architecture, with its red spire and intricate marble carvings, draws thousands of devotees and curious travelers alike.

Northeastern state in Mexico. Monterrey serves as its capital.

Located in northwest England, Birmingham has a tremendous history as an industrial city. Close to coal and iron ore supplies, it was here that Bouton and Watt harnessed steam power to run machinery. The Museum of Science and Industry resides here and provides an excellent look at England's history.