In this small strip mall resides the largest collection of original art from the famed TV artist.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

Walk down these stairs to get an underwater view of Switzerland's Lake Zug.

This North African stone complex is considered to be the oldest astronomical observatory on Earth.

According to a gruesome legend, an architect sacrificed his wife to build this spectacular, 16th-century cathedral.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

More than a century old, this trading post resides in the Navajo Nation.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

From Vikings to nationwide rebellions, this castle has seen its fair share of warfare.

The longest navigable underground river in the United States is home to countless blind and albino animals.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Hike, ski, or snowshoe to a backcountry yurt that serves up gourmet, four-course dinners.

These rose marble urinals are the most luxurious loos in Liverpool.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Despite what a Thai tourism board might want you to think, this white-sand beach is in fact located on a Scottish island.

The ruins of an 18th-century mansion that was once named "Mistake" by the man who had it built.

A historic bridge no one is allowed to cross.

Experience the glam side of air travel without leaving the ground at this speakeasy.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.