Boathouse, Gothic style, mysterious atmosphere, misty waterfront, eerie twilight, intricate stone carvings, pointed arches, ribbed vaults, flying buttresses, grandiose entrance, ornate wooden doors, rusty old anchors, dim lantern lighting, foggy river surface, lily pads, water lilies, overgrown vegetation, moss-covered stones, weathered wooden docks, mist-shrouded trees, dark mysterious interior, stained glass windows, grand chandelier, luxurious furnishings, rich velvet drapes.