What is paraskevidekatriaphobia? Hint: click the damn thing to find out.
If you like the number thirteen... you might find the Winchester Mystery House very interesting. Click the quoted text to read more.
"Today the home is owned by Winchester Investments LLC and it retains unique touches that reflect Winchester's beliefs and her reported preoccupation with warding off malevolent spirits. The number thirteen and spider web motifs, which she considered to be lucky, reappear around the house. For example, an expensive imported chandelier that originally had 12 candle-holders was altered to accommodate 13 candles, wall clothes hooks are in multiples of 13, and a spider web-patterned Tiffany window contains 13 colored stones. In tribute, the house's current groundskeepers have created a topiary tree shaped like the number 13. Also, every Friday the 13th the large bell on the property is rung 13 times at 1300 in tribute to Sarah Winchester. It was also obvious that Sarah was intrigued by the number "13". Nearly all of the windows contained 13 panes of glass; the walls had 13 panels; the greenhouse had 13 cupolas; many of the wooden floors contained 13 sections; some of the rooms had 13 windows and every staircase but one had 13 steps. This exception is unique in its own right.... it is a winding staircase with 42 steps, which would normally be enough to take a climber up three stories. In this case, however, the steps only rise nine feet because each step is only two inches high."
I went to the Winchester Mystery House while visiting my mom when she lived in California. It was very neat. If your ever near it, I recommend visiting!