Started as a kitchen garden, now the second largest botanical garden in the world.

This sprawling Jewish cemetery is one of the largest in Europe.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Sniff the Titan Arum's rotting flesh.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This small stone building, the final work of a renowned artist, offers a peaceful environment with radiant, colorful glass windows .

Free public park and gardens filled with peacocks and peahens.

One part antique store, one part curiosities hodge-podge.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Catacombs turned marketplace.

The curios of pharmacist and collector Henry Wellcome.

An unusual round church in London with a Templar past.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.