The futuristic test model of an iconoclastic visionary who wanted to redesign the world.

A New Jersey state park that was once Napoleon's brother's sprawling estate.

This mansion on an island off the coast of Georgia once belonged to a 108-year-old heiress.

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.

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

Giant, pink stuffed rabbit on an Italian mountain.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

Architectureal fantasy quarter of Rome.

A fascist-era rural village abandoned since the early 1980s.

It's believed that these columns marked the end of the Via Appia.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

The social hall of this former factory is a Communist-era time capsule.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

A decaying, yet still functioning, work of communist architecture.

The temple that withstood the Nazis.

This rose and lavender oil distillery still operates as it did more than a century ago.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

Sofia's legislative center is continuously reinventing itself.

Eastern Bloc nostalgia, anybody?

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.