A hidden three-foot-wide house separates these two regal churches.

This church houses the tomb—but not the remains—of St. Nicholas, the likely progenitor to Santa Claus.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

A massive tribute to Estonian history and culture.

A medieval setting reimagined into a unique art alley.

Mysterious craters may have been home to an ancient cult.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

Barça football fans might see the insignia hidden in a church window as a divine sign.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Quite simply the largest tree in the world (by volume).

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

This series of Armenian caves held the oldest brain, shoe, and winery in the world.

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

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

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

According to tradition this is the oldest church in Venice, but its actual age is a mystery.