The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

Five candy-colored villages on the Italian Riviera.

This mural changes every few years.

A natural rock bridge towers above the sea.

This extraordinary geological oddity resembles human-made pavement.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

For a century, the tallest building in Tasmania was a tower built to manufacture ammunition.

An underwater statue of Christ blesses the depths off Key Largo.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Rare karst landscape eroded from a flat seabed.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

In 1847, Brigham Young climbed this hill to survey the Salt Lake Valley and saw a fine place to build a city.

Largest man-made excavation on earth!

Largest collection of mounted dinosaur specimens in the world.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.