It's really easy to see the creepy, abandoned hospital on Ellis Island - and most people have no clue

The last time I went to Ellis Island was on a fourth-grade field trip during a unit on immigration. We marveled at the size of the Great Hall and made crayon rubbings of the names on the Wall of Honor.

I didn't think about returning until recently, when a friend mentioned the Ellis Island hard hat tour. The 90-minute guided tours take visitors through the unrestored hospital buildings on the south side of the island. It's perfect for history buffs and anyone who wants a more in-depth Ellis Island experience. As a bonus, the decrepit hospital complex is also home to a fantastic photography exhibit by French street artist JR.

There are a limited number of spots available each week, so if you're thinking of taking the tour, be sure to book well in advance. Tickets are $60, which is a deal considering they also include admission to the rest of Ellis Island's exhibits, as well as ferry fare. Be sure to wear comfortable walking shoes.