An emerald-green grotto just a short trip from Austin.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Now abandoned, this East Austin school for the disabled began as the "State Colony for the Feeble-minded."

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

A former electrical substation is now home to an eccentric junk art masterpiece.

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

A grove of colossal man-made flowers built to collect the sun's rays.

Free public park and gardens filled with peacocks and peahens.

Some islands... they come, they go, especially on Lake Travis.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The amazing wonder cabinets of a very rich Austrian archbishop.

The prototype for all Nazi concentration camps.

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

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.