The rums of Ron Zacapa are made from virgin sugar cane honey which is harvested and processed in southern Guatemala. The cane honey is fermented, distilled and then brought to maturation at the ‘House above the Clouds’ through the aging process known as Sistema Solera. The Ron Zacapa Centenario (23 Solero) is blended from these solera aged stocks which range in age from 6 years to 23 years. The aging barrels used are a mixture of American Whisky casks, and Sherry and Pedro Ximenez wine barrels.
The combination of solera aging and the variety of reused barrels creates a highly complex rum with a rich aroma and flavour which my Judging Panel and I have ranked as the number 6 rum in my Rum Howler 2012 list of the Best Rums in the World:
# 6 – Ron Zacapa Centenario (23 Solero)
About the only flaw this rum has is that it is so hard to find in my locale!
______________________________________________________________________________________________________________________________________________________________________________________________________
The Panamonte Reserva XXV is a new well aged Panamanian rum from PANAMONTE BRANDS. This is a molasses based rum produced from sugar cane grown and distilled in Las Cabras de Pese. Handcrafted by Master Blender, Francisco “Don Pancho” Fernandez Perez, this rum is very special, as every drop of the Panamonte Reserva XXV rum has been aged for a minimum of 25 years in used bourbon casks.
The Plantation Guatemala Gran Anejo is a Guatemalan rum produced from sugar cane syrup (rather than molasses) on a short column still. The rum is aged for a minimum of four years in bourbon casks in Guatemala after which it is transported from Guatemala to France by 
In 1749, in the Nassau Valley of Jamaica, the Appleton Estate Sugar Factory was founded. The Nassau Valley is a fertile, interior valley with a special mild micro-climate which is ideally suited to the growth of sugarcane. A water source which wells from a limestone rock formation provides an exceptionally soft pure water which used for the production of Appleton Rums. The Appleton Estate Rum is crafted from pot stills in small batches. After blending and aging the rums are ready for bottling. Unlike most rums produced in the Caribbean, Jamaican law forbids the use of an age statement unless the entire contents of the bottle are aged at least as long as the stated age.
I was first introduced to the 
The Rum Howler Blog 