In which a local geological marvel becomes a quaint roadside attraction.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

A failed piece of Orientalism has become the proud symbol of a community.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Pennsylvanian mass grave and possibly mass murder.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

The first museum in the U.S. to address human rights issues in China.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

Largest Roman Catholic church in North America.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

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

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

Eighteen miniature death-scene dioramas.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.