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

Hollowed out cedar log tubs set in an ancient towering forest.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Though difficult to access, this stunning cave has a place in Scotland's poetic history.

Vibrant paintings stretch across 600 feet of derelict railway.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

This former train tunnel is filled with lines from a poem crafted by Robert Louis Stevenson.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

A sea cave with a waterfall and Viking past

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

One man spent 10 years building a spectacular section of road because no one else would.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A scattered trail of street art adds a pop of color to the city's stark structures.

The heads of two giant mythological water horses honor Scotland's horselord past.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.