Eastern Europe is truly one of our favorite areas to travel in. There are many reasons to visit this section of the world. It truly has something for everyone! The cities are magnificent with archaic architecture found nearly everywhere — not to mention the amazing art museums and symphonies that you can visit. There are also dozens of outdoor activities to do if you like rafting, hiking, or rock climbing. The countryside is unbelievably interesting and it hides all sorts of old ruins. There is even a pyramid which can be compared to the one in Giza – and it may even be larger and older. It’s currently being excavated and it contains several rooms. Amazingly, the rooms are heated and even cooled by many underground rivers and various hot springs that can be found in the mountains nearby. It’s thought that these are linked to the rooms in the pyramid. When I first l heard about this I thought to myself that it was perhaps the perfect form of A/C. This, as yet undiscovered A/C system (if that is actually what it was) involved no energy consumption, yet it easily and efficiently heated and cooled these weird rooms deep within this giant pyramid. On one trip to the site, I commented to our colleague that the seasoned “HVAC” plan found at this archeological site was infinitely better than our old forced air and oil heating systems along with the central A/C units back home, or even the ones in the town where the two of us were staying. It is actually quite ironic. My room in the tiny little town had heat (Eastern European winters are excessively cold), but it lacked A/C and was suffocatingly hot during the day. Thankfully our guide was glad to take us to the old “air conditioned” chambers of the archeological site on hot afternoons and the two of us were even able to assist in the excavation effort to unmask the mysterious structure by hauling rocks out of some excavated caves.