Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

Less a museum than a bizarre fantasy world created by artists and engineers.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

This museum explores the grim reality of life in the earliest British colonies in America.

Giant busts of 42 U.S. presidents sit, crumbling in a field in Virginia.

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

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

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

The oldest standing structure in downtown San Diego.

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

It would be a crime to miss it.

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

An ode to the friendship between four Pacific Rim countries.

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

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."