Private Tour: Traditional Black Cab Tour of London's Hidden Treasures. Check off London’s most famous landmarks and lesser-known sights on this private, half-day tour. Travel around the English capital in an iconic black cab and pass by the Tower of London, Buckingham Palace, Big Ben, the Houses of Parliament and other top attractions. Then, head off the beaten path in search of Henry VIII’s cow shed, Winston Churchill’s cigar chair and other quirky sights. Book and Save 10% Off Private Tour: Traditional Black Cab Tour of London's Hidden Treasures.