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.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A Civil War Museum with some notable medical antiques.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This free, take-a-book shop seems like a trick but isn't.

An astounding collection of medical specimens, including bits of President Lincoln.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The trials and tribulations of marking Poe's grave.

The remains of the great moral philosopher reside in a university in London.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

The curios of pharmacist and collector Henry Wellcome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.