London

Here's a suggested itinerary for 4 days in London:

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. You can take a guided tour to learn about the castle's history and see the Crown Jewels. Afterward, head to the nearby Tower Bridge and walk across it for stunning views of the River Thames.

For lunch, head to Borough Market, one of London's oldest and most famous food markets. You'll find a wide variety of delicious food stalls and vendors selling everything from fresh produce to artisanal cheeses.

In the afternoon, visit the British Museum, which houses an incredible collection of artifacts from around the world. Don't miss the Rosetta Stone and the Egyptian mummies.

Day 2:

Start your day with a visit to St. Paul's Cathedral, one of London's most iconic landmarks. You can climb to the top of the dome for breathtaking views of the city.

Afterward, head to the nearby Tate Modern, a world-renowned museum of modern and contemporary art. The museum is housed in a former power station and has a stunning collection of works by artists such as Picasso, Warhol, and Hockney.

For lunch, head to the nearby Southbank Centre Food Market, where you'll find a wide variety of street food vendors and stalls.

In the afternoon, take a stroll along the South Bank of the River Thames, where you'll find street performers, art installations, and stunning views of the city.

Day 3:

Start your day with a visit to the Houses of Parliament and Big Ben. You can take a guided tour of the historic buildings and learn about the workings of the British government.

Afterward, head to nearby Westminster Abbey, where many of England's monarchs have been crowned and buried. The abbey is also the final resting place of many famous Britons, including Isaac Newton and Charles Darwin.

For lunch, head to Covent Garden, a bustling shopping and dining district with a wide variety of restaurants and cafes.

In the afternoon, visit the National Gallery, which houses an incredible collection of European art from the 13th to the 19th centuries. Don't miss works by Van Gogh, Monet, and Botticelli.

Day 4:

Start your day with a visit to the iconic Buckingham Palace, the official residence of the British monarch. You can watch the Changing of the Guard ceremony, which takes place daily during the summer months.

Afterward, head to nearby Hyde Park, one of London's largest and most beautiful parks. You can rent a boat on the Serpentine lake or simply enjoy a leisurely stroll through the park.

For lunch, head to Notting Hill, a trendy neighborhood with a wide variety of cafes and restaurants. You can also explore the famous Portobello Road Market, which sells everything from antiques to vintage clothing.

In the afternoon, visit the Victoria and Albert Museum, which houses an incredible collection of art and design from around the world. Don't miss the museum's stunning collection of fashion and textiles.