From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

This geothermal hot spring hides beneath a slowly growing mineral dome.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This luxury shopping lane has been protected by its own tiny police force for over a century.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

A circus legend leaves an unexpected endowment.

A monument celebrating the idea of reaching inaccessible places.

The only castle in North America to ever house European sovereigns.

Neo-cave art on the macro scale.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Sacred Buddhist home of some spiritual monkeys.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

Even Henry David Thoreau found this glacial pothole irresistible.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Hill-like structures formed by glaciers and sandy spits of land.

Overgrown ruins of a turn of the century island fort that sees very few visitors.