This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A lush indoor jungle fills this bustling Madrid transportation hub.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

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

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

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Bacteria and algae give the salty water its bubblegum hue.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

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

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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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 sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Costa Rican accommodation resembles a crash site, but with a nice balcony.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Sloth rehabilitation center in the jungle of Costa Rica.

At this museum in Iceland, visitors can sample fermented Greenland shark.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.