Iceland's largest lagoon is home to stunning multi-colored icebergs.

This replica Viking village was created for a film that was never shot and is now open to visitors.

The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

Sip a cappuccino in the historic cafe that introduced them to the United States.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Catacombs turned marketplace.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

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

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

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

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

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

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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This 1920s Dutch barge is now a floating bookstore.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”