35,000 grape hyacinths flow like water down a garden hill.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

Stories of sightless fish and ghostly cowboys are only a fraction of the legends surrounding this Kansas sinkhole.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

Rare recess caves fill this unbelievably beautiful Ohio park.

The fifth-longest natural arch in the world, and the longest outside China.

This remote desert watering hole has a connection to a curious chapter of American history.

A futuristic climate change study is nestled deep within this public land.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

An off-the-beaten path cave with an underground lake.

This unassuming layer of clay boasts an out-of-this-world origin story.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A snapshot of the city's fascinating voodoo culture.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.