London

Here's an ideal itinerary for 3 days in London for a couple:

Day 1:

• Start your day with a visit to the iconic Tower of London. This historic castle has served as a royal palace, prison, and even a zoo over the centuries.
• After exploring the Tower, take a stroll across the Tower Bridge for some stunning views of the River Thames.
• Head to Borough Market for lunch, where you can sample delicious food from around the world.
• Spend the afternoon exploring the South Bank, home to the Tate Modern art museum, Shakespeare's Globe Theatre, and the London Eye.
• End your day with a romantic dinner at one of the many restaurants along the South Bank.

Day 2:

• Begin your day with a visit to Buckingham Palace to watch the Changing of the Guard ceremony.
• From there, head to Westminster Abbey, where you can see the final resting places of many famous Britons, including Isaac Newton and Charles Darwin.
• Take a stroll through St. James's Park on your way to lunch at one of the many charming cafes in the area.
• In the afternoon, explore the British Museum, which houses an incredible collection of artifacts from around the world.
• End your day with a show in the West End, London's famous theater district.

Day 3:

• Start your day with a visit to the iconic Big Ben and Houses of Parliament.
• From there, take a short walk to the Churchill War Rooms, where you can learn about Winston Churchill's leadership during World War II.
• For lunch, head to Covent Garden, a bustling area filled with street performers, shops, and restaurants.
• Spend the afternoon exploring the National Gallery, which houses an impressive collection of European paintings.
• End your day with a romantic dinner at one of London's many Michelin-starred restaurants.

Of course, this is just one possible itinerary - there are countless things to see and do in London, so feel free to customize your trip based on your interests!