A giant concrete egg marks this Indiana town as the "Egg Basket of the Midwest."

Hear the quietest sound from across the dome.

Historic medieval fortified city in southwest France.

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

God's Saharan sandbox of wrath.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Crumbling necropolis set high above Fez.

Traditional 11th-century outdoor tannery.

Mosaics, storks, and brothels—this ancient city has it all.

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

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

This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

Holding the current title of "biggest chair in the world," it stands with little fanfare in Lucena, Spain.

Rare karst landscape eroded from a flat seabed.

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

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

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

Houses are tucked between, on, and underneath giant boulders.

This star-shaped military outpost is now simply trying to protect itself from neglect.

The earliest known map to show America, discovered by accident at a Paris bookshop.

An ancient Egyptian temple in the middle of Madrid, Spain.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'