Sumela Monastery in Turkey - is built on a cliff, around a cave and hanging over a precipice. It was originally built in 386 by two Athenian priests and has fallen into ruin several times. In spite of restoration plans, the ruins remain primarily untouched.
Geghard Monastery, Armenia The monastery of Geghard (Armenian: Գեղարդ, meaning spear) is a unique architectural construction in the Kotayk province of Armenia, being partially carved out of the adjacent mountain, surrounded by cliffs. It is listed as a UNESCO World Heritage Site. While the main chapel was built in 1215, the monastery complex was founded in the 4th century by Gregory the Illuminator at the site of a sacred spring inside a cave.
The Ruins at Talisay City, Philippines. This mansion was built back in the early 1900's by a sugar baron. This was the largest residential structure ever built at that time. The mansion met its sad fate in World War II when the mansion was burned to prevent the Japanese forces from utilizing it as their headquarters. It took days of inferno to bring down the roof and the 2-inch wooden floors.