CLEVELAND -- Cleveland is one of those fabulous cities with so much to offer if you take the time to discover it. This week my five things are hidden treasures downtown.

Paul Farace is the curator of the U.S.S. Cod, the World War I era submarine, which opens for tours Saturday, May 2. He said it's a tribute to our industrial heritage. "Much of the equipment in the Cod was built in and around Cleveland. Our five diesel generator engines that drove the Cod all the way around the world, were built right here in Cleveland by General Motors."

You can check out the torpedo room, where the sailors ate, and the crammed spaces where they slept. The Cod is so intriguing it's the focus for the sketch crawl this Saturday hosted by the Downtown Cleveland Alliance. The first Saturday of each month, a group of artists tours different locations and captures a piece of Cleveland on paper. "Architecturally and history wise there are so many stories hidden behind closed doors. What we like to do with the Downtown Cleveland Alliance is open those doors and let people actually see part of their own city," said Josh Taylor, public relations manager for the Downtown Cleveland Alliance.

The Money Museum at the Federal Reserve Bank in downtown Cleveland is a great place to learn about finances. It's open to group tours and the public can stop by for a free tour Monday through Thursday from 10 a.m. - 2 p.m. You can test your skills and make a guess at which bills are real and which ones are fake.

Next on our list is the Veterans Memorial Bridge, once called the Detroit Superior Bridge. Maybe you've driven over it thousands of times but have you really seen it? It will be open to pedestrians Memorial Day weekend.

And fifth on our list this week is the Cleveland Police Museum, which highlights some of the notorious criminals as well as police heroes in Cleveland. You can see a jail cell from the 1920s and discover how the Cleveland Police Department was responsible for many firsts.