It's known for being one of the hardest reservations to get in the state, according to Ever After in the Woods. It's a hidden gem that's not so hidden on Witherspoon Street in downtown Princeton, and the perfect spot for celebrating a special occasion. Hardest reservation to get in NJ is at Elements in PrincetonIt's Elements. It's across from Princeton Public LibraryThe upscale restaurant across the street from the Princeton Public Library is described as Princeton's Culinary Masterpiece. That is not the only restaurant in New Jersey where it's hard to get a reservation.