This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

Built following the War of 1812, this fort has withstood hurricanes for centuries.

This roadside attraction in the woods of Mississippi is a scalable replica of the Holy Lands during biblical times.

The highest bridge in America was built for an almost unnervingly small amount of money.

This tiny, hurricane-resistant house in Galveston is one of the city's most notable architectural oddities.

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

An emerald-green grotto just a short trip from Austin.

Unusual house, in an unusual neighborhood, home to some very unusual peanuts.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

Moonbows over Kentucky.

A historic, scenic mill that was forced to close due to overlogging.

An unfinished rail tunnel that has since been used to house cheese and bats.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Temporary Burning Man sculpture made of two 18-wheelers.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

An unrealized dream to wirelessly electrify the entire Earth.

Eliot was the first missionary to produce religious text for Algonquians in their own language.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

The quirky gift from West Berlin for the 1968 World's Fair still stands in Hemisfair Park.

An antique horse-drawn hearse provided French luxury for the dead in this Texan town.

Ruins of a once-opulent grand Victorian resort.