Tourism has spiked in Costa Rica, but locals say the flurry of activity has caused the Blue Zone lifestyle they're seeking to fade away.Sergio OrtizTourism has spiked in Costa Rica, with visitors trying to get a taste of the Blue Zone lifestyle.But as tourists flood the area, locals say key elements of the Blue Zone life are fading away.Tourists want more amenities, infrastructure, and foods not found in the area, changing local habits.Tourists are flocking to Costa Rica, with visitors trying to get a taste of the Blue Zone lifestyle that promises better-than-average health and longevity.And while the country's economy has grown to depend on the tourism industry, locals say the surge in outside influence has resulted in key elements of the Blue Zone's customs fading away.Costa Rica's Nicoya Peninsula is one of five "Blue Zones" known for residents who live longer and healthier lives than others around the world.