At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

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

340 bicycles, 65 feet high.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

The southernmost outpost of the Russian Empire in colonial America.

Celebrating the transformation of trash into objects of beauty.

A trash dump made beautiful by nature's power.

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

Experience a charming 1930's version of "infotainment."

The drama of nature in full effect in this Nevada State Park.

A tunnel with windows, so you don't miss out on the impressive views.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Massive still life just off the highway in Kansas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A "miracle" that seems to produce more holy fistfights than holy revelations.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A museum documents the development of the invention that tamed the Wild West.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.