This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Commonly acknowledged as the only public monument to the Devil himself.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A pair of gigantic baby heads greet passengers at Atocha Station.

A lush indoor jungle fills this bustling Madrid transportation hub.

A haven for book enthusiasts across the street from Retiro Park.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This lucky bronze frog was gifted to Madrid by a casino.

Strange secondhand shop showcasing taxidermy and oddies

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Sacred Indian temple that’s all monkey business.

The world's second-largest sundial, made entirely out of stone.

Ornate, dome-topped cenotaphs fill this royal crematorium.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This bridge was constructed from the rubble of the infamous Bastille.

The video game-themed street art first popped up in the French city.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.