Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

A historic observatory precariously perched at the "Top of Europe."

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

Breathtaking and huge 430 year old maps of Italy.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This 25-foot tall clock tower commemorates the start of one of America's foremost shopping districts and the end of the historic Palm Beach Pier.

The oldest house of worship in Palm Beach has a wonderful tropical garden.

This mass grave for victims of a massive hurricane remained hidden until 1991.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

The platform atop this verdant volcano was built with the help of a royal elephant.

Handcrafted thermal spa washes away each night with the tide.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

This sheep farm has been forever transformed since being built for “The Hobbit” film series.

This private mansion turned Catholic bishop’s home is an iconic Galveston building.

The historic tall ship is one of just three of its kind still sailing open waters today.

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

Originally brought to Texas by Czech settlers, these sweet and savory pastries are an essential local breakfast staple.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.