A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

A limestone grotto where daylight filters in from below and turns the water a beautiful turquoise. Also home to a small underwater nativity scene.

Locals use these rock pools and waterfalls for swimming and cliff diving.

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.

A lush indoor jungle fills this bustling Madrid transportation hub.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

An exquisite Baroque church in Vienna's old town.

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

The site of Austria's biggest concentration camp now honors its victims.

The personal charnel house of Anton Bruckner.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The largest brick bridge in the world.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.