258 World Cities.
How many have you visited?

Tokyo has more Michelin-starred restaurants than any other city. Its trains run so precisely that delays are measured in seconds.

Why go: Walk the gardens of old temples, then cross Shibuya Crossing, often called the world's busiest intersection. Eat at tiny ramen shops and watch sumo practice at a training stable.

The Eiffel Tower grows up to 6 inches taller in summer as its iron expands in the heat. Underground, the Catacombs hold the remains of 6 million people.

Why go: See the Mona Lisa at the Louvre, go up the Eiffel Tower at sunset, and walk along the Seine past the booksellers. Eat croissants at a sidewalk café and explore Montmartre.

London has over 170 museums, and many are free. Big Ben is the name of the bell inside the tower, not the tower itself.

Why go: Tour the Tower of London and see the Crown Jewels, then visit the British Museum. Catch a West End show and watch the Changing of the Guard at Buckingham Palace.

Rome is the only city in the world with an entire country inside it, Vatican City. About €3,000 is thrown into the Trevi Fountain every day.

Why go: Walk through the Colosseum and see Michelangelo's Sistine Chapel ceiling. Toss a coin in the Trevi Fountain and eat carbonara in Trastevere.

Singapore's Changi Airport has a butterfly garden and the world's tallest indoor waterfall. The country has banned chewing gum since 1992.

Why go: See the Supertree Grove at Gardens by the Bay and eat cheap street food at hawker centers. Explore the shophouses of Chinatown and Little India.

Dubai is home to the world's tallest building, the Burj Khalifa, and the world's largest shopping mall.

Why go: Go up the Burj Khalifa to see where the desert meets the sea, then ski indoors at the Mall of the Emirates. Walk through the Gold Souk and take a sunset dhow cruise.

The Sydney Opera House roof is covered with over 1 million self-cleaning tiles. Sydney Harbour hosts the city's famous New Year's Eve fireworks.

Why go: Climb the Sydney Harbour Bridge and watch surfers at Bondi Beach. Explore the Rocks, take the ferry to Manly, and see a performance at the Opera House.