An open-air "garden" of mural art that changes weekly.

A bookstore dedicated to the intersection of comedy and art.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

This former royal palace with gorgeous gardens became the first museum in Morocco.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Iceland's tribute to its thankless civil servants.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The former home of Dutch anthropologist Bert Flint now houses a collection of Berber art and artifacts.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

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 cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Three columns of volcanic rock shoot out of the ocean.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

This restored 17th century synagogue is one of the few remaining structures in Morocco’s ruined Jewish quarters.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.