The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Walk the whole Mississippi River!

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The original goat tower, the one that started it all.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

A walk through the historic city center, under the streets of Seattle.

See just what life was like in a 19th-century prospecting town.

There is one corporation registered for every three square feet of space in this inconspicuous office building.

Twisted buildings adorn the banks of the Rhine river.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

"We Seceded Where Others Failed."

The most confusing clock in New York.

Largest man-made excavation on earth!

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

When flour explodes, it's not a pretty sight.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A fitting attraction for the corn capital of the world.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.