Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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 was finally completed in 2026—a century after the death of its architect.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

The tallest freestanding structure in the United Kingdom.

This tiny shoe shop claims to be the smallest store of its kind in Britain.

The western face was supposedly left clock-less to snub the Welsh.

This memorial pays homage to the Royal Air Force squadron that breached two important dams during World War II.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

Peek inside restored planes at this off-the-beaten-path collection of aviation archaeology.

Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

The last working windmill in the U.K. that has eight sails.

The Last Home of an Executed King.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

A seaside town with no sea in sight.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.