The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

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

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A bizarre roadside attraction and the first instance of miniature golf in the world.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.