Wichita, Kansas. Campbell Castle, designed by Boston architect Alfred Gould in 1888, is listed on local, state, and national landmark registries. The 13-bedroom limestone home has 16 bathrooms, a commercial kitchen, a turret room, German stained glass, and ornate wainscoting and millwork.

The castle and a four-bedroom carriage house lie along a bank of the Little Arkansas River. $3,500,000. Debbie Rich, Weigand Realtors, (316) 708-1954.

Boise, Idaho. This five-bedroom castle was built in 2010 out of local sandstone. Features include radiant floors, leather-paneled walls, exposed beams, marble and brass fixtures, and a theater.

The exterior has a portcullis, an iron-gated entrance, and a rooftop terrace with a kitchen, bar area, hot tub, fire pit, and greenhouse. $2,997,000. Missy Coman, Group One/Sotheby's International Realty, (208) 484-8617.

Newport, Rhode Island. The Wyndham Estate is an eight-bedroom, baronial-style mansion that sits on the highest point in Newport. Built in 1891 by William Ralph Emerson, the house features a 1,800-square-foot master suite, marble and parquet floors, a ballroom, ornate millwork, and updated systems.

Outdoor details include manicured gardens, a waterfall, and a roof deck with 360-degree ocean and harbor views. $6,895,000. Michael Sweeney, Mott & Chace/Sotheby's International Realty, (401) 314-3000.

Yonkers, New York. This six-bedroom castle is just 25 minutes from Manhattan. Built in the 1920s, the house boasts 11 fireplaces, an octagonal ballroom with Hudson River views, an oak-paneled parlor, a Turkish-style room, and a master suite with a marble terrace.

Other amenities include a split-level observatory, a wine cellar, staff quarters, and a private chapel. $3,495,000. Terhi Edwards, Douglas Elliman Real Estate, (646) 541-8072.

Southlake, Texas. Built in 2007, this eight-bedroom home has 10 turrets and a full tower with battlements. The interior includes a wine room, a theater, and a two-story great room with Gothic-style windows.

The property features an outdoor kitchen, four covered patios, a garage with room for 12 cars, and a pool with a waterfall. $3,950,000. Diane Gallichio, RE/MAX Pinnacle Group, (817) 319-4097.

Chianti, Italy. This castle dates back to the 14th century and was transformed in the 19th century to its current layout. The 12-bedroom home has original frescoes, antique terra-cotta floors, coffered ceilings, a loggia with panoramic views, and modern systems.

The 5-acre grounds feature ornate gardens, a tennis court, a swimming pool with a pool house, and a small grove of olive trees. $7,280,000. Prestige Property Group, (001) 44-1935-8171888.