Regent’s Park is one of the most beautiful of London’s major parks and is known as the "jewel in the crown" of London’s parks. Originally owned by Henry VIII, it was redesigned in 1811 by John Nash, who created a rounded shape, a long boating lake, and a second home for the prince. The park was closed to the public until 1845, when Queen Victoria opened it two days a week. Now it is open every day from dawn to dusk.
This area of the park is known for its waterfowl, probably because of the large body of water! You will likely observe geese, swans, ducks of all varieties, and grey herons if you are very lucky. (We weren’t.) The cache is located on a bridge that crosses the lake, and it’s a great location for watching the birds. Many of them are friendly and will come right up to you for a handout, which is discouraged by park wardens.
You are searching for a tubular plastic container painted to match its surroundings. Magnets are involved, as expected. The cache contains a log and a pencil, but I ran out of sharpeners, so bring a pen just in case. You will not need to leave the bridge to retrieve or replace the cache.