Perhaps the most spectacular grotto along the Algarve coastline.

The only pollutant in the clear blue water is sunscreen.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The glacier tucked within a New Zealand rainforest.

A recreation of the bar from the classic 1942 movie “Casablanca.”

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

A unique seaside cave where Aleister Crowley faked his own death.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Eat the ultimate iteration of Portugal's most beloved pastry.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A hidden three-foot-wide house separates these two regal churches.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Site of the first radio and telephone broadcasting companies in Copenhagen.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Copenhagen's celebrated theme park and gardens.

A bronze sculpture on a bridge, of the shoes of 29 famous Malmöites.

Swedish skyscraper with a 90° twist.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

An ancient wall in the shadows of the Amber Castle.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.