This former Nazi labor camp is now a poignant memorial, complete with giant Soviet-style monuments.

This historic tower in the California desert promises visitors a "vortex of good vibes".

A UFO scrapyard in the California desert.

Once a meeting point for great thinkers, and the midpoint of the country.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

A science fiction-inspired apartment building designed by a famous Spanish architect.

A giant Troll lurks under one of Seattle's oldest bridges.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.