Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Famously misunderstood wonder of the ancient world

A beautiful geyser under environmental threat.

A hand-built folk art installation covered with messages of God's love.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

The United States Capitol's former columns still stand.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Notorious artist squat renovated into legal studios.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A 140-year-old castle with underground caves hidden in San Francisco.

Dramatic river bend surrounds a natural red-rocked pedestal.

These fantastically named natural pools look like something out of a Scottish myth.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Most-visited and most-photographed slot canyon in the American Southwest.

A kaleidoscopic warehouse-maze of handmade neon signs.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.