A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A small island hides in plain sight on Austin's Lady Bird Lake.

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

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

One of few surviving standpipe water towers in the U.S.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This unique building in the main square stands out among the city's typically Baroque architecture.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

An archaeological treasure trove towers over the valley of Chiavenna.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

The largest cactus farm in Africa.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.