The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Electrical curiosity museum housed in an old transformer station.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

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

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

A unique set of caves that spits waves back out into the ocean.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

One street divides a single town that stands in two U.S. states.

This old-fashioned carhop restaurant gave the world the waffle cone.

An overgrown garden stands as a grim marker of an unrealized dream.

The oddly shaped, steam-spewing building is now an art studio and gallery.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This maze-like slot canyon is a unique gem within an already fascinating geological area.