In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Building owners can take out tiles for free at this repository for historic building materials.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

Go inside to really appreciate this 500-year-old technological masterpiece.

This museum promotes informed contraception by documenting its often secret past.

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

An artistic melting pot inside an old roadside inn from the Ottoman era.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This Transylvanian church has changed its denomination four times.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

Eighty million natural history specimens call this gargantuan museum home.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.