One of the world's oldest olive trees, thought to be over 2,000 years old.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Though they look like Hobbit houses, these semi-underground stone structures were built for winemaking.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Southern Italy's spinning top village.

There's an exclusive Beefeaters pub hidden in the Tower of London.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

Banksy gives themself artistic license with this piece of London street art.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

This spectacular track has run continuously since 1882.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Community owned and operated, this property is home to a diverse set of nudists.