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

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

Spain's stunning solar energy plant.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

An eerie collection of the surviving structures from a past celebration of the future.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Legend says the only thing buried within this magnificent tomb was a dog.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Six paintings reminding you that death is integral part of everyday life.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A British Commonwealth cemetery in the heart of Milan, with 421 allied soldiers died during World War II.

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

A tree that defies gravity grows in an ancient ruin.

This abandoned Brutalist treehouse is a hidden architectural relic.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

The disputed geographic center, or "navel," of Italy.