Places suehle Wants to Go

A series of playful yellow penguins share a serious message about the environment.

An existential riddle in the world's largest ancient castle.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

An Orwellian sculpture with eyeball cameras watches passersby.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

Designed by Gustave Eiffel before his famed tower.

Built on the foundations of an ancient Roman villa, the unique architecture of this castle on the Catalan coast was used as a set for 'Game of Thrones.'

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Wooden pavers represent a 17th-century barrier that gave Wall Street its name.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Home to a dizzying array of letterpress blocks with a rich history.

An eerie collection of the surviving structures from a past celebration of the future.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

A Spanish forest is filled with mysterious stone carvings.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

Bacteria and algae give the salty water its bubblegum hue.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Mountain where Jesus was first tempted by the Devil.

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

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.