Ireland, County Down, Downpatrick, Inch Abbey ruins.

Ireland, County Fermanagh, Ruin of Tully Castle on the shores of Lough Erne which was a fortified house with a rectangular bawn built for Sir John Hume, a Scottish planter, in 1619.

Ireland, County Fermanagh, Ruin of Tully Castle on the shores of Lough Erne which was a fortified house with a rectangular bawn built for Sir John Hume, a Scottish planter, in 1619.

Ireland, County Fermanagh, Ruin of Tully Castle on the shores of Lough Erne which was a fortified house with a rectangular bawn built for Sir John Hume, a Scottish planter, in 1619.

Guatemala, Rainforest trees grow on an unrestored ruin in Group H in the the ruins of the Mayan city of Tikal in Tikal National Park, a UNESCO World Heritage Site.

Guatemala, Temple V, a ruin in the archeological site of the ancient Mayan culture in Tikal National Park, Sacrificial altar in the foreground, UNESCO World Heritage site, Temple V was built around 70...

Guatemala, Temple V, a ruin in the archeological site of the ancient Mayan culture in Tikal National Park, UNESCO World Heritage site, Temple V was built around 700 AD in the Late Classic Period and i...

Greece, Attica, Athens, Acropolis ruins seen through trees.

Greece, Attica, Athens, view over city from the Acropolis.

Greece, Attica, Athens, Acropolis with crowds of tourists.

Greece, Attica, Athens, Acropolis with crowds of tourists.

Greece, Attica, Athens, Acropolis with crowds of tourists.