Buckingham Palace, Big Ben, London Eye, Trafalgar Square, Downing Street, Hyde Park and Speaker's Corner, Tower of London, Tower Bridge, Westminster Abbey, St Paul's Cathedral, British Museum, National Gallery, Harrods department store are all within London. Outside London is Windsor Castle, Stonehenge and Stratford upon Avon. It really depends on your personal interests.
There is no interesting places to visit in California.
Grand Canyon, London Bridge and Hoover Dam.
Interesting place to visit in Bolivia
Every place that you can visit in Antarctica is 'interesting' at least to the people who manage the visit.
Botswana.
There are many scenic and interesting places to see while in Washington. Chinook Pass, Cascade Valley, and Sherman Pass are great places to visit.
well
the beaches
Disneyworld!
yes there are
Adventure land
The Zoo and the Stockyards