Reaching the "Church in the Sky" requires scaling the cliff face of a sandstone pinnacle with a 650-foot drop.

Massive stele returned to Ethiopia after 70 years in Rome.

Supposedly this Ethiopian chapel holds the Ark of the Covenant, guarded by virgins who cannot leave the building.

Armenia's premier center of astrophysical research was established during the Soviet era.

Called the "Armenian Stonehenge," this ring of menhirs pierced with holes may be a prehistoric astronomical observatory.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

A geological oddity topped with a 2,000-year-old pagan temple.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

An ocean in the making, in the Ethiopian desert.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

An ancient Ethiopian cave church is endangered by the simple building of a road.

At the United Kingdom's only residential library you can sleep among the books.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

Certain traditions prevail on the least-visited island of the Aran Islands.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.