At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

A one-armed veteran of the Battle of Waterloo lies in a cemetery for one in the middle of a Chicago scrapyard.

A Chicago Movie Palace Lost to Time.

A hollow cement depiction of time's inexorable effect on the human body.

Stunning Roman aqueduct used for 1900 years and still standing.

Village situated on a narrow volcanic escarpment.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A lush indoor jungle fills this bustling Madrid transportation hub.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

This secluded walking trail is a hidden gem of a Pittsburgh park.