Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

A devastating landslide accidentally created this tourist hotspot.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

Natural cathedral designed by Italian artist Giuliano Mauri.

The only museum with its curator—and her pets—buried inside.

Where Venice's gondolas go for a tune-up.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

These delicate sand pyramids look like naturally occurring gothic spires.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.