01 Statue of Liberty & Ellis Island
Two different products sold under one name. The ferry that lands on Liberty Island and Ellis Island is the half-day; the sightseeing cruise that sails past without stopping is ninety minutes and starts at €21. Crown access is a separate, months-ahead reservation with the National Park Service. Decide which of the three you actually want before comparing prices.
02 Observatories
From €27, and the choice is about what you want in the view: Top of the Rock has the Empire State in it, the Empire State does not. Sunset slots cost more and sell out first at all of them. One good observatory beats a pass covering three.
03 9/11 Memorial & Museum
From €25. The memorial pools outside are free and open; the museum below is the ticket, and it needs two hours and some resolve. Guided versions led by people connected to the day rate highest by a clear margin, which is unusual for a museum.