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.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Small rustic cabin nested in the mountains of Killington, VT.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A reproduction of earth's many biomes.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

An experimental, automotive replica of Stonehenge.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The largest self-built castle in the U.S., six decades in the making.

An urban laboratory.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Abandoned bridge hidden deep in the San Gabriel Mountains.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.