It’s been a busy year for us here at Untapped. We’ve added new, behind-the-scenes tours, updated our site and explored hidden places across New York City. Now that 2018 is drawing near, we thought we’d take a look back at the most popular articles in the past year.

From our must-visit neighborhood guides to our features about abandoned places, here’s a peek at all that we’ve explored in 2017:

1. Behind-the-Scenes Hard Hat Tour of the Abandoned Ellis Island Hospital

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This past spring, we launched our tour of the abandoned Ellis Island Hospital complex, which has gone on to become one of our most popular events. Now, thanks to our partnership with Save Ellis Island, we bring Untapped readers behind-the-scenes every week for this unique exploration, where visitors have the opportunity to visit the facility’s contagious disease wards, its autopsy rooms and other places usually closed to the public.

While Ellis Island has become one of New York City’s top tourist attractions, drawing over two million visitors per year, the 22-building South Side hospital complex is hidden in plain sight, just to the left of disembarking passengers headed towards the Great Hall. Once the standard for United States medical care (and later transformed to the FBI headquarters when the island served as a detention center), it has been left to decay for nearly 60 years. Looking at its desolate, skeletal frame now, it’s difficult to imagine its backstory as one of the largest public health undertakings in American history. If you haven’t already joined us for the tour, get a unique peek inside by booking your tickets below:

Behind-the-Scenes Hard Hat Tour of the Abandoned Ellis Island Hospital

Check out all of our Behind the Scenes Tours.