Elevated freight railway turned wildly successful urban park.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The world’s first penitentiary, meant to be humane, drove men insane.

One of downtown Berlin's last reminders of its Communist past.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The most visited, and possibly most controversial, museum in Germany.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Art and armour fill every inch of this rich kid's Italian villa.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Secret refuge and museum of the Duke of Florence.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Walk through a fairytale in Tuscany.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Anatomical cabinet holds unexpected treasures.

Golden Gate Park's historic collection of plants.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

The world's oldest continuously operating airport was founded by the Wright Brothers.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.