A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

Modern art commemorates one of the first military actions of World War II.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

This antique thermometer honors the creator of the first universal temperature scale.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

This floating sculpture of ice is a poignant reminder of nature's power.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.