A medieval castle in the middle of rural Texas.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

A Texas museum filled with Broncos and Betties.

One of the last Art Deco gas station still standing in Dallas.

A serene temple with stunning stained glass hides in downtown Dallas.

This collection of bronze hands comes from astronauts, presidents, baseball greats, and more.

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

Artist James Turrell's ode to dawn and dusk on the campus of Rice University.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

Fantastic collection celebrating the final send-off.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Three hundred years of preserved Spanish colonial history in San Antonio.

A synth musician's paradise at the heart of a community responsible for the soundtrack to 'Stranger Things.'

Roadside Americana, fairy tale characters, and Austin quirkiness come together at this magical course in the heart of Texas' capital city.

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

A popular swimming hole that hides one of America's most deadly diving spots.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

A spectacular overlook of the Little Grand Canyon of the San Rafael River, a deep sandstone gorge streaked with orange, red and white in a remote, uncrowded part of Utah.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.