Spain has been ranked as the best country for U.S. retirees seeking to live abroad, according to a new study by investment migration firm Global Citizen Solutions. The Global Retirement Index evaluated factors like cost of living, healthcare quality, and visa accessibility. Spain outperformed Portugal, Costa Rica, Uruguay, and Mexico, which rounded out the top five destinations. Experts highlighted Spain's affordable lifestyle and strong healthcare system as key advantages for retirees. The findings aim to guide Americans planning their overseas retirement.