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

This semi-secret storybook hedge maze is also the oldest garden in the city.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

A stately palace has been converted into the world's largest cannabis museum.

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

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

South of Bologna, a limestone grotto with a protruding waterfall and a floor full of cave pearls.

Thousands of well-dressed mummies below a monastery.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

A tiny church on a man-made island in the Adriatic.

One of 200 religious buildings recognized as a “culture monument.” 

This remote church calls a tiny island its sanctuary.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

This medieval Italian village was transformed into an architectural marvel by the famous "Papessa" Donna Olimpia.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.