The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

This ancient church, rebuilt at least 3 times, is flanked at all sides by history.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

A 12th century church completely covered in shells.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

An indigenous take on European design creates a stunning visual overload.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Experiencing Guatemala's sensory-exploding church is a blunt reminder of European influence.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

A mysterious dark-skinned Christ statue has been this town's religious center for centuries.

Some of the saint's blood and bones are said to reside in Dublin.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This single room has survived the centuries with almost no deterioration.

The oldest church in Iceland is one of the few to feature ornate decoration.

This beautiful, historic church looks like something out of a simpler past.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Small church built in the 19th century for whites and slaves to worship together.

Built in 1512, the oldest cathedral in the Americas.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.