Strange physical sensations and optical contradictions keep visitors coming back for more.

This freshwater spring fills with 10,000 gallons of water per minute.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

An amazing collection of sculptures and art.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

When waves crash onto this section of beach, the rocks sing a song.

These curious caverns have been home to mushrooms, gangsters, and disco.

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

This large midwestern cavern features impressive rock formations and an underground waterfall.

When flour explodes, it's not a pretty sight.

Home to drunken tower-climbing goats... seriously.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

The first park built over a freeway is a brutalist masterwork.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

This Costa Rican topiary park is a surreal garden of unearthly delights.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.