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

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

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

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

360° views of the city plus five floors of optical illusions and hands-on science.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

A moving memorial to the fallen and missing from WWI trenches.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Metro station with a claim to rock n' roll fame.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Berlin's old airport.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

The Sun King's military models, saved from the Louvre.