This private residence was the template for one of the most beloved television homes of all time.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The exterior of this home was used for the hit television show, The Brady Bunch.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

A geological mystery on Camelback Mountain.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A marvel of Byzantine engineering under the streets of Istanbul.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A pocket of jungle amidst urban expansion in Panama.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

The ruins of a medieval monastery built on a perilous slope.

A whimsical bridge adorned with decorative dragons.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Budapest's Communist-era statues, banished to the suburbs.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.