Manaus, capital of Brazil’s Amazonas state, is a city that rises unexpectedly from the rainforest. Once the center of the global rubber boom in the late 1800s, Manaus still holds onto that legacy with surprising elegance. The Teatro Amazonas, an opulent opera house imported piece by piece from Europe, sits at the heart of the city, its pink façade and domed roof tiled in the colors of the Brazilian flag. Today, it hosts concerts, festivals, and curious visitors eager to step back in time.

Tunis' white-washed, blue-shuttered buildings hide a treasure trove of Arabic and Ottoman art. Inspect illuminated manuscripts from the Koran, follow the twists and turns of the fascinating old Medina (inner city), marvel at the ornate Palace of Dar Ben Abduallah and the magnificent Djamaa-Ez-Zitouna Mosque, whose 184 columns were "recycled" from the rocky ruins of Carthage.

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.

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.

The Isle of Man, nestled in the Irish Sea between Great Britain and Ireland, offers visitors a blend of rich history and distinctive culture. Known for its ancient Celtic and Viking roots, the island’s heritage can be explored through sites like Peel Castle, built on a rocky island in the harbor of Peel, and the ancient Manx museums scattered throughout.