The Del is the local name for the Hotel Del Coronado, the big, red-roofed hotel on Coronado Island, across the bay from downtown San Diego. It has what is often called the best beach in America, and the hotel has been there about a hundred years. The movie "Some Like It Hot" was filmed there in the 1950s. It's a place totally worth seeing, if only to walk the grounds and have a meal in their restaurant. This is their website:
https://hoteldel.com
For those who want to timeshare it, the Del is literally right across the street from the Coronado Beach Resort timeshare.
Dave