Riga has the largest Art Nouveau architecture collection in Europe. elaborate
Ha Long Bay's thousands of limestone karsts and isles are believed to have formed over 500 million years ago. elaborate
Macau is the only place in China where gambling is legal. elaborate
Santo Domingo is the oldest continuously inhabited European settlement in the Americas. elaborate
Kolkata is home to the world's only remaining tram system still operating on a large scale. elaborate
San Francisco's Lombard Street, famously known as the "most crooked street in the world," has only eight sharp turns. elaborate
Kampala is built on seven hills, similar to Rome. elaborate