Around 50 million gallons of water flow from this spring every day.

A statue of the beloved storybook character stands in front of the building in which her creator was born.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

This railroad tunnel was once the longest in Massachusetts.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

An ode to "The Queen of Appalachia."

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

This beautifully deceptive waterfall is something far different from what it appears to be.

Half of a waterfall goes into the river while the other half seems to disappear.

An enchanting natural wonder in Puerto Rico's Camuy River Park.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

A relic of the region's once booming timber industry.

This unusual lava tube spouts seawater during high surf.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

The world's only above water sand volcano, believed to once be the bathtub of a priest.

A natural dome made of volcanic glass in Inyo National Forest.

A historic, scenic mill that was forced to close due to overlogging.

This small turbine mill along Rocky Creek was built in 1928

It's said that visitors can "see" Tasmania inside this cave.

A 40-foot waterfall flows into this unique natural swimming hole.

An unusual slot canyon in the Aztec/Navajo Sandstone has a cross-section like an inverted old-fashioned keyhole.