The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

One of the highest points in Bexar county offers birdseye views of San Antonio and a four-story stone tower.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

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

Three hundred years of preserved Spanish colonial history in San Antonio.

On the outskirts of San Antonio, a small bridge is said to be the home of a mysterious local legend known as the "Donkey Lady."

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

These boots are made for selfies.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

Museum dedicated to the terror regimes of Hungary.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.