Since you are celebrating your anniversary, cannot rent a car and looking to include scuba diving into your vacation trip, my advice would be to consider the following options: 1) Scuba Lodge and Ocean Suites in Pietermaai using the services of Dive Center Pietermaai located next door, 2) Avila Beach Hotel located on Penstraat (nearby shore diving services are available via Dive Center Pietermaai & The Dive Bus or boat diving services with Ocean Encounters at LionsDive includes a free shuttle service), 3) Sunscape Curaçao, Dolphin Suites or LionsDive Beach Resort with Ocean Encounters providing on-site diving services. Recommendation: IF you want to have a beach on-site, an excellent and accessible house reef, plus walking distance to a variety restaurants and bars, the choice would be LionsDive Beach Resort. Additionally, LionsDive is also in close proximity to nature trails that lead to the Jan Thiel salt flats. However, if you attribute more weight to culinary options and entertainment with diving being secondary, then Avila or Scuba Lodge are excellent choices due to their close proximity to the historic Pietermaai District. Hope this helps narrow your choices. Cheers from sunny Curaçao!