Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Single runway interrupted by a busy road that cuts across its middle.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A huge enchanting public park just outside the ancient walls of Rome.

The remnants of a creative early method of wildfire prevention.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

Four abandoned towers hidden above the Douglas fir forest in Washington.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

This unusual lava tube spouts seawater during high surf.

This landmark is a central figure in the Nez Perce origin story.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.