These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Roman ruins top white travertine terraces formed by ancient hot springs.

A serious museum dedicated to two German comedians.

A museum dedicated Germany's favorite drink and most well-known festival.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

The telescope that discovered Neptune.

A delightful but little-known public observatory and planetarium in Munich.

The scars of World War II are preserved on its walls.

An abandoned train station in Munich constructed for the 1972 Olympic games.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A monument dedicated to a lone, brave invader.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Visiting this café is like visiting the Austrian grandma you wish you had.

Apartment complexes built into huge repurposed natural gas tanks.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

A silly medieval mural preserved on the side of a Viennese house.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The beautiful baroque library of the Hapsburg empire.