The original span of a high bridge across the deep Crooked River Gorge has been preserved for pedestrian use.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Few of the many visitors to this resort town know of its hidden Maya ruins.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

As its grandiose name implies, this wooden dome is unsurpassed in size.

Inside the Wayne County airport is an amazing collection of lights and sounds.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

The world’s only museum dedicated to baked beans.

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Giant topiary dog once played a role in a terrorist bomb plot.

A historic Christian shrine nestled within a spectacular natural cave.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Go inside to really appreciate this 500-year-old technological masterpiece.