Semi-precious Blue John stones have been mined in this cavern system for centuries.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Follow the original medieval paths that wind through this intriguing section of the city.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

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

Tubing through a cave lit with glowworms is a magical underground experience.

After the devastating 2011 earthquake, historic Christchurch begins to recover, starting with the pop-up Re:START mall.

A New Zealand couple's shell-adorned home living room, now on display at the Canterbury Museum.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

This Scottish manor house is a lush relic from the life of a literary great.

Largest lake in Great Britain measured by surface area.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Reverend Franzo Wayne King administers spiritual enlightenment through the music of the jazz legend.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

Budapest's Communist-era statues, banished to the suburbs.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.