A gargantuan crystal kingdom.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

An ancient tower built during Roman times as a lookout post still stands to this day.

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.

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

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A stately palace has been converted into the world's largest cannabis museum.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Of course Salvador Dalí lived in a castle...