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.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This bridge uses an inverted bowstring truss and is believed to be the only of its kind in the United States.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The largest ancient burial mound in Ohio.

The largest earthwork effigy in the world.

Take a drunken tour inside the world's largest known geode.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

An annual festival celebrating Colorado's most famous frozen corpse.

A downtown park built on top of unclaimed graves.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This super steep hike ascends 2,000 feet in less than a mile.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

When ecosystems collide in the arid Southwest.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.