The little-known final resting place of one of America's greatest writers.

A historical home in upstate New York honors the work of John W. Jones, a formerly enslaved man who was a major agent for the Underground Railroad.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

A subterranean display of public art and architecture.

An abandoned train station in Munich constructed for the 1972 Olympic games.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This formerly abandoned amusement park includes a classic carousel and a replica of Mark Twain's famous hut-like Elmira study.