This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

Orcas on display and in the water.

Webcam that broadcast the hatching of Bald Eagles to millions of viewers.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Traditional 15th century Chinese garden in the middle of Vancouver.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

The largest flower auction house in the world.

It's always summer at the beach inside this former airship hangar.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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

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

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Macabre astrological automaton clock dating to the late 1400s.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Go surfing on this urban wave, "hacked" by local surfers.