Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The largest self-built castle in the U.S., six decades in the making.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This historic graveyard was partially paved over to create a streetcar line.

The oldest standing structure in downtown San Diego.

One of the largest trees of its kind in California.

San Diego's most historic and haunted home.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

A Saint Nicholas-themed ghost town in the Mojave desert.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

A tribute to the statues of Easter Island along Route 66.

A replica of the flagpole that gave a frontier town its name.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.