Dead weights honor the dead of Portugal's fishing industry.

This small chapel is built of human bones and decorated with a golden skeleton.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

When this former hospital pharmacy closed in 2013 it already looked like a museum, so they turned it into one.

A Spanish artist builds his own castle.

A historic Christian shrine nestled within a spectacular natural cave.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

One of the world’s longest pedestrian suspension bridges.

A 16th-century Andalusian palace.

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

This bridge was designed to connect a road that never came to fruition.

This incredible narrow-gauge mountain railway was created by a ceramic artist.

Water-powered gadgets whirr to life in this quirky eco park.

The "Rocky Horror Picture Show" character has a hidden camera that broadcasts people doing the "Time Warp."

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

The morbid items in this small and hidden museum are not for the weak stomached.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.