The third tallest lighthouse in America once guided author Stephen Crane to safety.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A vertically floating hemlock controls the waves and weather at Crater Lake.

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

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

World's largest Christmas store.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The largest permanent Monopoly board makes one of the longest games even bigger.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A giant chess set, minus the psychedelic drug trip.

This giant shopping mall still holds signs of its automotive past.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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.

The highest point on the island known for buildings that touch the sky.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.