This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This single room has survived the centuries with almost no deterioration.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

There are eight natural springs around town, each with a slightly different taste.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

Some of the saint's blood and bones are said to reside in Dublin.

One of Ireland's most infamous prisons for rebels including men, women and children.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

A misnamed well, with a deep dark past.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

A museum dedicated to the alleged Roswell Incident.