Central America's deepest lake is Lake Atitlan. The towns and villages around the lake are experiencing much development - not all of it welcome.

San Marcos la Laguna: Many Western tourists come to San Marcos to take meditation and healing courses offered by the village's nine therapy centers.

One example is San Marcos la Laguna. Once off the beaten track, it's now a preferred destination of expats in search of real estate.

San Marcos la Laguna: San Marcos businesses, most of them owned by foreigners and Guatemalans from the capital city, advertise massages and other tourist comforts along the village's dirt paths.

That worries some local residents -- as Jill Replogle reports:

Locals Mayans pawn textiles and trinkets to a tourist in a lakeside town. Tourism is the main business for most villages around Lake Atitlan.