Ruins of an old water tower that look like a horror-film castle.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

The site of the notorious Camp Sumter Prison is now a peaceful memorial.

This park is the prime habitat for Nepal’s Bengal tigers.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The former headquarters of history's oldest megacorporation.

A winery built on the site of a Gallo-Roman estate uses historical tools to recreate ancient vintages.

A collection of trees from various corners of the world call Stockholm University home.

If a visit to this farmhouse feels as if you are stepping into an artistic masterpiece, you’d be right.

This magnificent white pagoda was constructed to resemble a sacred Buddhist mountain.

This castle was once the home of one of the most powerful women of the Renaissance.

A forgotten "city of water" underneath the famous Trevi district.

See the nearly two-century-old ruins of pre-railroad America at the former site of a lock on the Ohio and Erie Canal.

Inspired by the more famous Scrovegni Chapel, Cappella di San Giovanni contains several amazing frescoes.

This building has survived for more than a century and remains virtually untouched.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

The Internet Age began with a transmission from this biker bar.

The remains of a boarding school designed to forcibly assimilate Native American children.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A response to the wrongly placed meridian of the same name.

This temple contains what might be the world's oldest optical illusion.