Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

A temple to modernity, tucked away amid Barcelona's more well known museums.

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

Turntable anonymously received orphans, alms, and groceries.

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

Week-long block party becomes a competition for the best decorated street.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

A unique Tuscan hideaway acts as an art mecca as well as a hotel.

Church holding the preserved body of a levitating saint.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.