The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

It is the only marker for one of the most famous hate crimes in American history. There are no other memorials for him in the entire state.

The only museum and archive west of the Mississippi that is dedicated to the study of Abraham Lincoln.

A single light illuminates one man's overshadowed contributions to street lamp history.

A 60-room castle constructed by a horse-racing heir.

These five Art Deco homes were meant to solve the "small house problem."

A men’s restroom became a sandwich shop.

The oldest still-operating tavern in the United States was once owned by a pirate.

From sax to spuds, get 'em all at this landmark music establishment.

Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

This church on a Tohono O'Odham reservation has stood since 1797.

The final residence of an educator, civil rights leader, and presidential advisor was also the first headquarters of the National Council of Negro Women.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Experience the glam side of air travel without leaving the ground at this speakeasy.

This 16-foot-diameter wooden coin has been standing in Iowa City since 2006.

A Milwaukee museum provides an unsparing and ultimately empowering look at the Black American experience.

The Boston home of a conductor on the Underground Railroad.

In a historic steel foundry east of the Mississippi River, thousands of wooden crates hold the architectural remnants of buildings long gone but not forgotten.

A concrete arrow from a 1920s network of airmail beacons is still preserved at the western edge of suburban Reno.

A shockingly detailed small scale recreation of the temples of Abu Simbel.

One of the few authentic Japanese gardens in the state of Indiana and perhaps the most peaceful place in the city of Mishawaka.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.