Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

"The prettiest love letters in the world" ... or so said Lord Byron.

The mark of the Devil's horns on a marble column in Milan.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

The tragic heiress Barbara Woolworth Hutton built her seventh husband this Japanese-inspired palace in Mexico.

In a small churchyard in Dingolfing, Germany the quaint Schusterkapelle is there to remind you of your imminent mortality.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The secret medieval communication system will whisk your words above the noise of the crowd.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.