This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This curious, round temple is the oldest still-standing marble building in Rome.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A dam that moonlights as a gigantic, brutalist waterslide.

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

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.

Once called the Jersey Lilly, this former saloon was the domain of infamous Judge Roy Bean.

A high-octane shrine to the greatest Texans who ever lived.

This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

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

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

An unrealized Taoist palace left abandoned in a Houston suburb.

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

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.