Between the information-packed conference sessions, the cocktail reception Wednesday night and dinner aboard the USS Midway Thursday night, there’s plenty to keep attendees of this week’s 6th annual Corelation User Conference busy.

However, for those who are able to carve out a little extra time, there are plenty of interesting things to see in San Diego. If you’ve already visited the world famous San Diego Zoo or sipped cocktails on the deck of Hotel Del Coronado, here are five attractions you’ve probably never heard of that are well worth the trip.

Located at 3549 Union Street in the Mission Hills area of San Diego, Harper’s Topiary Garden has been a top attraction for more than 15 years. It’s located in front of a private home and is maintained by the homeowners. More than 50 amazing botanical sculptures are on display.

For those interested in haunted houses, The Whaley House, located at 2476 San Diego Avenue near the Old Town area, is a must-see attraction. It was built in 1856 by Thomas Whaley using bricks from his own brickyard. Over the years, there have been numerous reports of hauntings by docents, visitors and even television star Regis Philbin.

There are plenty of places to find Mexican food in San Diego, but perhaps none so interesting as Lucha Libre Taco Shop. This local institution serves up delicious food in a Mexican wrestling motif. There are two locations, one at 1810 W. Washington Street, and one at 3016 University Avenue.

For unusual food instead of an unusual motif, it’s hard to beat Crazee Burger, located at 3993 30th Street. In addition to traditional beef burgers, this restaurant serves burgers made from buffalo, alligator, venison, ostrich, camel, elk, wild boar and duck.

Dr. Seuss fans may not know that Theodore Geisel lived most of his life in San Diego. And, there are several locations around town that celebrate the children’s author. Scripps Park, located on the ocean at 1100 Coast Blvd. in La Jolla, is home to a rare Monterey Cypress tree that was his inspiration for the Lorax tree. And when you see it, you’ll understand why – it looks exactly like the book’s illustrations. Geisel could see this exact tree from his home. La Jolla is also home to Legends Gallery, which sells Dr. Seuss paintings and sculptures, and Geisel Library on the campus of the University of California, San Diego.

The Corelation User Conference runs May 16-18 at The Westin San Diego.