Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

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

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

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

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

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

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

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

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

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

A temple to modernity, tucked away amid Barcelona's more well known museums.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A complimentary beverage is offered to the bodega's resident rodents every day.

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

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

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

One of Ireland's most infamous prisons for rebels including men, women and children.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.