Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

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

A health museum containing a 27’’½-foot intestine.

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.

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

What is the Thing?

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

The world's tallest statue of an American hero.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

After 97 years of constant vigilance from the dome of the Texas State Capitol, the original Goddess of Liberty retired to a life of climate-controlled leisure.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Turning night into day in Victorian-era Austin to thwart a serial killer.

This failed condo development was reborn as a street art hub.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

An urban laboratory.

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