Described by William Wordsworth as a "World of Wonder."

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

One of the only places where Earth’s mantle lies above water.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.

This abandoned palace and the stupas around it conceal beautiful Buddhist frescoes, statues, and silk paintings.

A sacred mountaintop temple offers a fine cup of tea to visitors who can survive the journey.

These mountain hot springs have seen power struggles, doomed romances, and a generalissimo's attempted escape from mutiny.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

An ancient fortification lives on in this Chinese city.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

A fifth-century temple improbably built into the side of a cliff.

Stone shrouds of Prince Liu Sheng and Princess Dou Wan of the Han Dynasty, created to preserve their flesh for eternity.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

The largest stone moai on Rapa Nui.

A fiery crater has been burning in the Karakum Desert since 1971.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Sporting Brutalist architecture, this school is hidden amid a quiet suburban neighborhood.

This castle played host to the largest great hall found in medieval Central Europe.