London

Here's an ideal itinerary for 3 days in London that meets your constraints:

Day 1:

• Start your day with a visit to the iconic Tower Bridge and Tower of London. You can take a guided tour or explore on your own.
• After that, head to Borough Market for lunch. This is a great place to try some delicious street food and grab a drink.
• In the afternoon, take a stroll along the South Bank of the River Thames. You can enjoy the views of the city and stop at some of the many bars and cafes along the way.
• For dinner, head to the bar at Duck & Waffle. This restaurant is located on the 40th floor of the Heron Tower and offers stunning views of the city.

Day 2:

• Start your day with a visit to the famous St. Paul's Cathedral. You can take a guided tour or explore on your own.
• After that, head to Covent Garden for lunch. This is a great place to people-watch and enjoy some street performers.
• In the afternoon, take a walk through the beautiful Hyde Park. You can rent a bike or a boat if you want to explore more.
• For dinner, head to the bar at Hakkasan. This Michelin-starred restaurant offers delicious Chinese cuisine and a great atmosphere.

Day 3:

• Start your day with a visit to the iconic Buckingham Palace. You can watch the Changing of the Guard ceremony if you're there at the right time.
• After that, head to Notting Hill for lunch. This trendy neighborhood has plenty of great cafes and restaurants to choose from.
• In the afternoon, take a walk through the colorful Portobello Road Market. You can find all sorts of unique souvenirs and gifts here.
• For dinner, head to the bar at Sketch. This quirky restaurant has several different rooms, each with its own unique decor and menu.